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(3y-2)-7,2(2y-3)=1,2;

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

1,8y+10,8=1,2;

1,8y=-9,6;

y=-16/3;

y=-5⅓

 

Answer 2

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

5.4*3y-5.4*2-7.2*2y+7.2*3=1.2

16.2y-10.8-14.4y+21.6=1.2

1.8y+10.8=1.2

1.8y=1.2-10.8

1.8y=-9.6

y=-9.6/1.8

y=-5целых и 1/3