Question

determine o valor de x em cada proporções abaixo:​

Answer 1

Resposta:

$\frac{x}{8} =\frac{15}{2} \\\\\frac{8x}{8} =\frac{15 \ . \ 8}{2} \\\\x=60$

$\frac{1}{x} =\frac{10}{40} \\\\1 \ . \ 40=x \ . \ 10\\\\40=x \ . \ 10\\\\x \ .\ 10=40\\\\\frac{x \ . \ 10}{10} =\frac{40}{10} \\\\x=4$

$\frac{x}{12} =\frac{60}{48} \\\\\frac{x}{12} =\frac{5}{4} \\\\\frac{12x}{12} =\frac{5 \ . \ 12}{4} \\\\x=15$

Answer 2

Resposta:

1) 60

2) 4

3) 15

Explicação passo a passo:

1º

$\frac{x}{8}= \frac{15}{2} \\\\2x = 120\\x = \frac{120}{2}\\x = 60$

2º

$\frac{1}{x}= \frac{10}{40} \\\\10x = 40\\x = \frac{40}{10} \\x = 4$

3º

$\frac{x}{12} =\frac{60}{48} \\48x = 720\\x = \frac{720}{48} \\x = 15$