Question 78291
<pre>
-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