Originally Posted by Lneal
I am so stumped on solving it too. I cant remember if I need to undo the fraction by multiplying both sides of the equations by the reciprocal or combining the x 's first. Could you explain it?
I always found it easiest to break it down as much as possible:
x + 3/4x = 1400
x (1 + 3/4) =1400
x (7/4) = 1400
Now you multiply by the reciprocal to isolate the x
4/7 [x(7/4)] = 1400 (4/7)
x = 5600/7
x = 800
It has been a long time since I have done algebra, I used to love it and excel at it but when you don't use it you lose it so hopefully I did it right. Would wait for a confirmation from one of our algebra teachers first!