Answer:
1 solution , x = - 4
Explanation:
given the equation
- x - 4x - 7 = - 2x + 5 ( collect like terms on left side )
- 5x - 7 = - 2x + 5 ( add 2x to both sides )
- 5x + 2x - 7 = - 2x + 2x + 5 ( simplify both sides )
- 3x - 7 = 5 ( add 7 to both sides )
- 3x - 7 + 7 = 5 + 7 ( simplify both sides )
- 3x = 12 ( divide both sides by - 3 )
x =
, then
x = - 4
The equation has only one solution , that is x = - 4