Question

a) x - 17 = -9 n) 3. (x +2) + 5 = x + 12

Answer 1

A) x -17 = -9
x = -9 +17
x = 8

B) 3 (x +2) +5 = x +12
3x +6 +5 = x +12
3x -x = 12 -6 -5
2x = 6 -5
2x = 1
x= 1/2

Bons estudos!