How do you solve 4n-40=7(-2n+2)?

1 Answer
Oct 5, 2016

n = 3

Explanation:

First you want to use the foil method to solve the right side of the equation:

4n-40 = -14n+14

Then you move the -14n and the -40 over to the opposite sides:

4n+color(blue)(14n) color(red)cancel(color(black)(-40)) = color(red)cancel(color(black)(-14n))+color(blue)(40)+14

18n = 54

Then divide 54 by 18:

n = 3