Найду корень уравнения: (3,1x+x):0,8=2,05
31*x ---- + x 10 41 -------- = -- 4/5 20
((31/10)*x+x)/(4/5) = (41/20)
31/10x+x)/4/5 = (41/20)
31/10x+x)/4/5 = 41/20
x = 41/20 / (41/8)
x1 = 2/5
сумма
0 + 2/5
=
2/5
произведение
1*2/5
x1 = 0.4