Question

ALGUÉM ME SALVA PLMDS

A)3x-12<-9

B)5x+1>7+4x

C)-x-2>-4x-6

Answer 1

Resposta:

A)

$3x - 12 = - 9 \\ 3x = - 9 + 12 \\ 3x = 3 \\ x = \frac{3}{3} \\ x = 1$

B)

$5x + 1 = 7 + 4x \\ 5x - 4x = 7 - 1 \\ 1x = 6 \\ x = \frac{6}{1} \\ x = 6$

C)

$- x - 2 = - 4x - 6 \\ - x + 4x = - 6 + 2 \\ 3x = - 4 \\ x = \frac{3}{ - 4}$