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

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Answer 1 · 2016-10-05T15:55:14

#n = 3#

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#