Who Understands Algebra?
#102
Originally Posted by MadQuilter
Lisanne,
I think if you break it into the individual steps of how you get there, it might be easier to understand.
x - (1-5) = 3 (solve the parens)
x - (-4) = 3 (multiply a negative 1 times a negative # = positive #)
x + 4 = 3 (subtract 4 from both sides)
x = 3 - 4 = -1
I think if you break it into the individual steps of how you get there, it might be easier to understand.
x - (1-5) = 3 (solve the parens)
x - (-4) = 3 (multiply a negative 1 times a negative # = positive #)
x + 4 = 3 (subtract 4 from both sides)
x = 3 - 4 = -1
You're right, showing all the steps can be clearer, but IMO it's very tedious, so I wanted to show the quicker way.
Karla has given a fine explanation of the latest problem, but showing how I'd do it...
Originally Posted by Lneal
5y + 13 = 2y - 2
3y = - 15 (gets like terms on the same side of the equal sign)
y = -5 (simplifying)
Originally Posted by Lneal
-2(x - 5) + 4 = 4(2x-4)
-2x + 10 + 4 = 8x - 16 (getting rid of parentheses)
-2x + 14 = 8x - 16 (adding the like terms on the left)
30 = 10x (getting like terms on the same side of the equal sign)
3 = x (simplifying)
#103
I went back to school and graduated in 2002. Hard yes. But the funniest thing that I found was that all of the young people in class wated to sit by you on the first day..they thought that if you were older than you knew everything!!!fooled them!!!
Have fun and it is so awesome that you are doing this...I must say that graduating with a degree in front of my own kids was an awesome thing to share with them!!!
u go girl!!!!
Have fun and it is so awesome that you are doing this...I must say that graduating with a degree in front of my own kids was an awesome thing to share with them!!!
u go girl!!!!
#104
The first time I took algebra as an 8th grader, I totally bombed it! Then I took it in summer school and had a crush on the teacher, and got an A! But if you asked me any algebra questions today, I couldn't give you an intelligent answer. My advice--find a hottie teacher!
#105
wether or not anyone thinks of it as algaba or not as quilters we use it on ever quilt a-the quilt i want to make b=the number of squers i am going to make c the amount of material i will nee for the borders d=material need for backing and batting equals e the cost and full amount of material needed
hope this makes it easy a+b+c+d=e
hope this makes it easy a+b+c+d=e
#106
I teach algebra and geometry to students preparing to take the exam to enter business school, so I will be happy to help. If you get in a bind, PM me so I make sure to answer.
But Barnbum seems to be doing just fine in explaining the solutions to you. You 're going to get through this - really.
But Barnbum seems to be doing just fine in explaining the solutions to you. You 're going to get through this - really.
#107
I finished my pre algebra class last December with a B. I am now starting Business Math 110 and I am so frustrated with my abilities to understand applications of equations or word problems.
I would appreciate any help that I could get on explaining how to get the answer to this problem.
* The number of cars going north-south was 3/4 of those going east-west, and the total number of cars was 1400. Find the number of cars going north-south and east-west.
I am trying to set this up as an equation to solve and I am lost. Can anyone help explain it? Are there any suggestions for web sites that help explain how to set up word problems?
I would appreciate any help that I could get on explaining how to get the answer to this problem.
* The number of cars going north-south was 3/4 of those going east-west, and the total number of cars was 1400. Find the number of cars going north-south and east-west.
I am trying to set this up as an equation to solve and I am lost. Can anyone help explain it? Are there any suggestions for web sites that help explain how to set up word problems?
#108
Power Poster
Join Date: Dec 2008
Location: Western Wisconsin
Posts: 12,930
It helps to write it out in words before trying to form the equation.
X = # cars going east-west (this is the unknown)
3/4 X = # cars going north-south
1400= total number of cars
Total number of cars = # going east-west + # going north-south
1400 = X + 3/4 X
X + 3/4 X = 1400
This is how you can set up the equation. Let me know if you need help solving the equation.
X = # cars going east-west (this is the unknown)
3/4 X = # cars going north-south
1400= total number of cars
Total number of cars = # going east-west + # going north-south
1400 = X + 3/4 X
X + 3/4 X = 1400
This is how you can set up the equation. Let me know if you need help solving the equation.
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