Question

a) 3 - 3x = 12

b) 5x = -x + (-12)

c) 12x - 4(x + 2) = 8

d) -3x -2 = x + 8

Com cálculos

Answer 1

Resposta:

a) x = -3

b) x = -2

c) x = 2

d) x = -5/2

Explicação passo-a-passo:

a) 3 - 3x = 12 ==> -3x = 12 - 3 ==> -3x = 9 ==> x = 9 / -3 ==> x = -3

b) 5x = -x + (-12) ==> 5x + x = -12 ==> 6x = -12 ==> x = -12 / 6 ==> x = -2

c) 12x - 4(x+2) = 8 ==> 12x - 4x - 8 = 8 ==> 8x = 8 +8 ==> 8x = 16 ==> x = 16/8 ==> x= 2

d) -3x - 2 = x + 8 ==> -3x -x = 8 +2 ==> -4x = 10 ==> x = 10 / -4 ==> x = - 5/2