Question

решите уравнение 4/5 - (x + 1/60) = 2/3 100 баллов

Answer 1

$\frac{4}{5} - (x + \frac{1}{60}) = \frac{2}{3} \\ \frac{4}{5} - \frac{2}{3} = x + \frac{1}{60}$
$\frac{4 \times 3 - 5 \times 2}{15} = x + \frac{1}{60}$
$\frac{2}{15} = x + \frac{1}{60}$
$x = \frac{2}{15} - \frac{1}{60} = \frac{4 \times 2 - 1}{60}$
$x = \frac{7}{60}$

Answer 2

$\frac{4}{5} - (x + \frac{1}{60} ) = \frac{2}{3}$
$\frac{4}{5} - x - \frac{1}{60} = \frac{2}{3}$
$\frac{4}{5} - \frac{1}{60} - \frac{2}{3} = x$
$\frac{12 \times 4 - 1 \times 1 - 2 \times 20}{60} = x$
$\frac{48 - 1 - 40}{60} = x$
$x = \frac{7}{60}$