Question

qual o calcule de
3(-4)+x+17=3x+15

Answer 1

Resposta:

-5 = x

Explicação:

3×(-4)+x+17 = 3x+15

-12+x+17 = 3x+15

-12+17 = 3x+15-x

-12+17-15 = 3x-x

5-15 = 3x-x

-10 = 2x

-10÷2 = x

-5 = x

Answer 2

Resposta:

$3(-4)+x+17=3x+15 \\ -12+x+17=3x+15 \\ 5+x=3x+15 \\ 5+x-3x=15 \\ 5-2x=15 \\ -2x=15-5 \\ -2x=10 \\ x=\frac{10}{-2} \\ x=-5$

x=-5