Решите уравнение 2/3(7-2x)=1/2
2/3•7-2/3•2х=1/2 14/3=4 2/3-1 1/3х=1/2 4 2/3-1/2= 1 1/3х 28/6-3/6=25/6=4 1/6 Х=4 1/6: 1 1/3= 4 1/6•3/1 Х=4 1/2;