Question

me ajudem pfvv preciso hj ​

Answer 1

Resposta:

a)x=-2

b)x=-7,5

c) x=10/7

d) X=0

e). x= 19

f) x=2/3

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Explicação passo-a-passo:

a)

$3(x + 1) + 2 = 5 + 2(x - 1)$

$3x + 3 + 2 = 5 + 2x - 2$

$3x - 2x = 5 - 2 - 3 - 2$

$x = - 2$

b)

$5(2x + 7) - 1 = 4(x - 5) + 9$

$10x + 35 - 1 = 4x - 20 + 9$

$10x - 4x = - 20 + 9 - 35 + 1$

$6x = - 45$

$x = \frac{ - 45}{6}$

$x = - 7.5$

c)

$2(x + 1) + 5(x - 1) = 7$

$2x + 2 + 5x - 5 = 7$

$2x + 5x - 5 + 2 = 7$

$7x + - 3 = 7$

$7x = 7 + 3$

$7x = 10$

$x = \frac{10}{7}$

d)

$2(2x + 3) + 5(x + 1) = 8 - 3(x - 1)$

$4x + 6 + 5x + 5 = 8 - 3x + 3$

$4x + 5x + 3x = 8 + 3 - 6 - 5$

$12x = - 11 + 11$

$12x = 0$

$x = 0$

e)

$11(x - 7) - 7(x + 1) = 11 - x$

$11x - 77 - 7x + - 7 = 11 - x$

$11x + x - 7x - 77 - 7= 11$

$12x - 7x - 84 = 11$

$12x - 7x = 11 + 84$

$5x = 95$

$x = \frac{95}{5}$

$x = 19$

f)

$5(2x + 1) + 3 = 7(x + 3) - 11$

$10x + 5 + 3 = 7x + 21 - 11$

$10x - 7x = 21 - 11 - 8$

$3x = 2$

$x= \frac{2}{3}$