Question

Resolva a equação do primeiro grau
3x-7=-7x-2x+42

Answer 1

3X-7=-7X-2X+42
3X+7X+2X=42+7
12X=49
X=49/12
X=4,08

Answer 2

Resposta:

$3x - 7 = - 7x - 2x + 42$

$3x - 7 = - 9x + 42$

$3x + 9x = 42 + 7$

$12x = 49$

$x = \frac{49}{12}$