X/2 + x/3 = 4 7 + x/2=x+9/5 Решить уравнения
3х/6+2х/6 = 4 5/6*х=4 х= 4 : 5/6 х= 4* 5/6 х=10/3=3 1/3 7+х/2=х+9/5 х-х/2=7-9/5 1/2*х = 7-1 4/5 1/2*х = 5 1/5 х= 26/5 :2 = 13/5 = 2 3/5