Question

sendo r/s/t,determine o valor de x. ​

Answer 1

Resposta:

Explicação passo a passo:

a)

$\frac{3}{x}= \frac{6}{18} \\6x=54\\x=\frac{54}{6} \\x=9$

b)

$\frac{2x+2}{8}= \frac{4x-12}{12} \\12.(2x+2)=8.(4x-12)\\24x+24=32x-96\\-32x+24x=-96-24\\-8x=-120\\x=\frac{-120}{-8}\\ x=15$

Answer 2

Explicação passo-a-passo:

A)

$\dfrac{3}{x} = \dfrac{6}{18}$

Multiplique cruzado

$6x = 3 \times 18$

$6x = 54$

$x = \dfrac{54}{6}$

x=>9

B)

$\dfrac{2x + 2}{8} = \dfrac{4x - 12}{12}$

Multiplique cruzado

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

$32x - 96 = 24x + 24$

$32x - 24x = 24 + 96$

$8x = 120$

$x = \dfrac{120}{8}$

x=>15