Question

=
2x-6
6
15 9 9
7=42 [(x-2) = x
1
Х
12 20
= X
6

Answer 1

Resposta:

O resultado de cada uma:

A) X = 5

B) X = 36

C) X = 5

Answer 2

Explicação passo-a-passo:

A)

$\dfrac{2x}{15} = \dfrac{6}{9}$

$2x \times 9 = 15 \times 6$

$18x = 90$

$x = \dfrac{90}{18}$

x=5

B)

$\dfrac{7}{6} = \dfrac{42}{x}$

$7x = 42 \times 6$

$7x = 252$

$x = \dfrac{252}{7}$

x=36

C)

$\dfrac{x - 2}{12} = \dfrac{x}{20}$

$20(x - 2) = 12x$

$20x - 40 = 12x$

$20x - 12x = 40$

$8x = 40$

$x = \dfrac{40}{8}$

x=5