SOLUTION: -4(7x+10)=3(9x-5)+20

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Question 78291: -4(7x+10)=3(9x-5)+20
Answer by rmromero(383) About Me  (Show Source):
You can put this solution on YOUR website!


-4(7x+10)=3(9x-5)+20





To simplify this:

1. undo the parenthesis first. Use Distributive property



             -4(7x+10)= 3(9x-5)+20

   -4 (7x) + (-4)(10) = 3(9x) - 3 (5) + 20

            -28x - 40 = 27x - 15 + 20

      -28x - 27x - 40 = 27x - 27x + 5

       -55x - 40 + 40 = 5 + 40

                 -55x = 45





If we are to find x just divide -55 both sides

                        45

                   x = ____

                       -55



                          9

                     =  _____

                         -11