Question

Resolva as alternativas, descobrindo o valor de x.

Answer 1

a) -9x + 23 = -58
-9x = -58 -23
-9x = -81 . (-1)
9x = 81
x = 81/9
x = 9

b) 3x -2 +5 -x = 0
3x - x = -5 +2
2x = -3
x = -3/2