Question

Решите уравнение 0,2(7-2y)=2,3-0,3(y-6)

Answer 1

0.2*7-0.2*2у=2.3-0.3*у-0.3*6
1.4-0.4у=2.3-0.3у-1.8
1.4+2.3+1.8=0.4у-1.8у
5.5=-1.4у
у=5.5/1.4
у=-3.9