Найду корень уравнения: x:4,2=3,4:5,1
x 17 ---- = ---- 21/5 51 5*-- 10
x/(21/5) = (17/5)/(51/10)
x/21/5 = (17/5)/(51/10)
x/21/5 = 17/551/10
x = 2/3 / (5/21)
x1 = 14/5
сумма
14/5
=
произведение
x1 = 2.8