SOLUTION: 7x=3x-(x+20) {{{7x-3x}}}={{{-x-20}}} {{{4x+x}}}=-20 5x=-20 x={{{-20/5}}} x=-4 is the solution.

Algebra ->  Linear-equations -> SOLUTION: 7x=3x-(x+20) {{{7x-3x}}}={{{-x-20}}} {{{4x+x}}}=-20 5x=-20 x={{{-20/5}}} x=-4 is the solution.      Log On


   

Question 236107: 7x=3x-(x+20)
7x-3x=-x-20
4x%2Bx=-20
5x=-20
x=-20%2F5
x=-4 is the solution.
Answer by mathsteacher(28) About Me  (Show Source):