Question

5(x-1,5)=4.2/3x-8.3/14 решите уравнение даю 30 б

Answer 1

$5x - 7.5 = 4 \frac{2}{3} x - 8 \frac{3}{14} \\ \frac{2}{3} x - 1.5 = 0$
$\frac{2}{3} x = 1.5 \\ x = 1 \frac{1}{2} \div \frac{2}{3}$
$x = \frac{3}{2} \times \frac{3}{2} = \frac{9}{4} = 2 \frac{1}{2} = 2.5$