Question

A) 4x -7 =2x -8 ?
B)6m -4=12 -9?
C)m + 4 - 3m =4 +12m?
D)3+4m -9=6m - 4+12?
E)-5 +3x +4 =11+9x?

Answer 1

Explicação passo a passo:

A) $4x-7=2x-8$

Calculando:

$-2x+4x=-8+7$

$2x=-1$

$x =- \frac{1}{2}$

B) $6m-4=12-9$

Calculando:

$6m= 12-9+4$

$6m = 7$

$m = \frac{7}{6}$

C) $m+4-3m=4+12m$

Calculando:

$-12m+m-3m = 4-4$

$(-14)m=0$

$m = 0$

D) $3+4m-9 = 6m-4+12$

Calculando:

$-6m+4m = -4+12-3+9$

$-2m = 14$

$m = -\frac{14}{2}$

$m = -7$

E) $-5+3x+4 = 11+9x$

Calculando:

$3x-9x = 11+5-4$

$-6x = 12$

$x = -\frac{12}{6}$

$x = -2$