Question

3x +1 – x – 7x + 10x – 15 = 31 é:

Answer 1

Resposta:

3x + 1 - 8x + 10x - 15 = 31

3x + 2x - 14 = 31

5x = 31 + 14

5x = 45

X = 45/5

x= 9

Answer 2

Resposta:

x= -3

Explicação passo-a-passo:

$3x+1-x-7x+10x-15x=31\\3x-x-7x+10x-15x=31-1\\2x+3x-15x=30\\-10x=30\\\\x=-\frac{30}{10}\\\\x= -3$