How do you solve -71= - 5( 2r + 3) - 671=5(2r+3)6?

1 Answer
Aug 7, 2017

r=5

Explanation:

First of all, distribute -5 through the parenthesis

=> -71 = -10r-15-6 => -71 = -10r-2171=10r15671=10r21

Then, change -2121 side and don't forget to change its sign !

=> -71+21 = -10r => -50 = -10r71+21=10r50=10r

Then, you divide both side by -1010

(-50)/(-10) = (-10r)/(-10)5010=10r10

So 5 = r5=r (or r = 5r=5)