Question

Resultado de 3 x + 7 = x - 1

Answer 1

$3x + 7 = x - 1 \\ 3x - x = - 1 - 7 \\ 2x = - 8 \\ x = - \frac{8}{2} \\ x = - 4$


S = {-4}

Answer 2

3x+7=x-1

3x-x=-1-7

2x=-8

x=-8/2

x=-4

Resposta: -4