Question

Пропорция: /-дробь
0,3/y+5=0,4/y-8

Answer 1

$frac{0,3}{y+5} = frac{0.4}{y-8} \ \ 0.4(y+5)=0.3(y-8) \ 0.4y+2=0.3y - 2.4 \ 0.4y-0.3y=-2.4-2 \ 0.1y=-4.4 \ y=-4.4:0.1 \ y=-44$