Решите. 3х+х+20+х=270
3х+х+20+х=270 5х+20=270 5х=250 х=50
3x+x+x+20=270
5x+20=270
5x=270-20
5x=250
X= 250 : 5
X =50
3х + х + 20 + х = 270; 5х + 20 = 270; 5х = 270 - 20; 5х = 250; х = 250 : 5; х = 50.