решите уровнения 5,4(3y-2)-7,2(2y-3)=1,2

Question

решите уровнения 5,4(3y-2)-7,2(2y-3)=1,2

Answer 1

5.4*3у-2*5.4-7.2*2у-7.2*3=1.2

16.2у-10.8-14.4у-21.6=1.2

16.2у-14.4у=1.2+10.8+21.6

1.8у=33.6

у=33.6/1.8

y=18(12/18)=8(2/3)

Отв:18(2/3)

Answer 2

5,4(3y-2)-7,2(2y-3)=1,2

16,2y-10,8-14,4y+21,6=1,2

16,2y-14,4y=1,2+10,8-21,6

1,8y=-9,6

y= - 5,3

Ответ:y=-5.3