Question

me ajudem pfvr é urgente​

Answer 1

Resposta:

A)

$4(x + 1) = 12 \\ x + 1 = 3 \\ x = 3 - 1 \\ x = 2$

B)

$5(3 - x) - 4x = 18 \\ 15 - 5x - 4x = 18 \\ 15 - 9x = 18 \\ - 9x = 18 - 15 \\ - 9x = 3 \\ x = - \frac{1}{3}$

C)

$7(x - 2) = 5(x + 3) \\ 7x - 14 =5x + 15 \\ 7x - 5x = 15 + 14 \\ 2x = 29 \\ x = \frac{29}{2}$

D)

$2(x - 5) + 4(x - 1) = 0 \\ 2x - 10 + 4x - 4 = 0 \\ 6x - 14 = 0 \\ 6x = 14 \\ x = \frac{7}{3}$

E)

$3(2x - 1) = - 2(x + 3) \\ 6x - 3 = - 2x - 6 \\ 6x + 2x = - 6 + 3 \\ 8x = - 3 \\ x = - \frac{3}{8}$

F)

$7(x - 1) - 2(x - 5) = x - 5 \\ 7x - 7 - 2x + 10 = x - 5 \\ 5x + 3 = x - 5 \\ 5x - x = - 5 - 3 \\ 4x = - 8 \\ x = - 2$

G)?

H)?

I)

$9x - 3(2x + 2) = 15 \\ 9x - 6x - 6 = 15 \\ 3x - 6 = 15 \\ 3x = 15 + 6 \\ 3x = 21 \\ x = 7$

J)

$2.5(x - 2) - 1.5x = 1 \\ 2.5x - 5 - 1.5x = 1 \\ x - 5 = 1 \\ x = 1 + 5 \\ x = 6$