Question

Срочно помогитее!!!! ​

Answer 1

$\displaystyle1)\ \dfrac{2{,}5\big(x-4\big)}{5{,}6}=\dfrac{3}{4}\\\\\dfrac{x-4}{2{,}24}=\frac{3}{4}\\\\4\big(x-4\big)=2,24\cdot3\\\\4x-16=6{,}72\\\\4x=6{,}72+16\\\\4x=22{,}72\\\\x=\dfrac{22{,}72}{4}\\\\x=5{,}68$

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$\displaystyle2)\ 28:25=\dfrac{1}{15}x:\dfrac{1}{7}\\\\\dfrac{1}{15}x\cdot25=\dfrac{1}{7}\cdot28\\\\\dfrac{5}{3}x=4\\\\x=4\cdot\dfrac{3}{5}\\\\x=\dfrac{12}{5}$