Question

Выполни действия: (x - 2 1/4) × 4/5 = 1

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Answer 1

$\bigg(x-2\tt\displaystyle\frac{1}{4}\bigg)*\frac{4}{5}=1$

$x-2\tt\displaystyle\frac{1}{4}=1:\frac{4}{5}$

$x-2\tt\displaystyle\frac{1}{4}=\frac{5}{4}$

$x=\tt\displaystyle\frac{5}{4}+2\frac{1}{4}$

$x=\tt\displaystyle\frac{5}{4}+\frac{9}{4}$

$x=\tt\displaystyle\frac{14}{4}$

$x=\tt\displaystyle\frac{\not2*7}{\not2*2}$

$x=\tt\displaystyle\frac{7}{2}=3\frac{1}{2}$

Ответ: 3  1/2.