Answer:
x = 1
Explanation:
given
- 9x - 31 = - 5(x + 7) ← distribute parenthesis by - 5
- 9x - 31 = - 5x - 35 ( add 5x to both sides )
- 9x + 5x - 31 = - 5x + 5x - 35 ( simplify both sides )
- 4x - 31 = - 35 ( add 31 to both sides )
- 4x - 31 + 31 = - 35 + 31 ( simplify both sides )
- 4x = - 4 ( divide both sides by - 4 )
x =
, that is
x = 1