Question

решите пожалуйста 2-7y+15=-2y-5, =
4(1,2x+3,7)-2,8=5,2x, =
0,3(5y-7)=3(0,2y+3,2),=
4(3-x)-11=7(2x-5)=
0,9(4y-2)=0,5(3y-4)+4,4=

Answer 1

Первое
Раскрывает скобки 
4*1.2х +4*3.7-2.8=5.2х
4.8х-14.8-2.8-5.2х=0
-0.4х=17.6
х=17.6/ (-0.4)
х=44

Answer 2

1.5у-2.1=0.6+9.6

Answer 3

1.5у-0.6у=9.6+2.1

Answer 4

0.9у=11.7

Answer 5

у=11.7/0.9

Answer 6

у=13