Question

15х=58 12х=45 35=7х

Answer 1

$frac{15}{x}=frac{5}{8}$

$x=frac{15*8}{5}$

$x=24$

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$frac{12}{x}=frac{4}{5}$

$x=frac{12*5}{4}$

$x=15$

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$frac{3}{5}= frac{7}{x}$

$x=frac{5*7}{3}$

$x=11frac{2}{3}$

Answer 2

можно еще 71=12х