1. 5(у+1,2)=12,5y;
5у+6=12.5у
7.5у=6
у=0.8
2. 4(3-2х)+24=2(3+2х)
12-8х+24=6+4х
12х=30
х=2.5
3. 0,2(5у-2)=0,3(2у-1)-0,9
у-0.4=0.6у-0.3-0.9
0.4у=0.4-1.2
0.4у=-0.8
у=-2
5(y+1,2)=12,5y
5y+6-12.5y=0
-7.5y+6=0
y=6/7.5
y=0.8
4(3-2х)+24=2(3+2х)
36-8x-6-4x=0
30-12x=0
x=30/12
x=2.5
0,2(5у-2)=0,3(2у-1)-0,9
y-0.4-0.6y+0.3+0.9=0
0.4y+0.8=0
y=-0.8/0.4
y=-2
