1. 15-3х+13=12х-32
28-3х=12х-32
28+32=3х+12х
15х=60
х=4
2.12-8х+24=6+4х
36-8х=6+4х
36-6=8х+4х
12х=30
х=2.5
3. 1у-0.4=0.6у-0.3-0.9
у-0.4=0.6у-1.2
у-0.6у=0.4-1.2
0.4у=-0.8
у=-2
4.12-4х-11=14х-35
1-4х=14х-35
-4х-14х=-35-1
-18х=-36
х=2
5.2/3п-1/6=11/6-4/3п
2/3п+4/3п=1/6+11/6
2п=2
П=1
6.0.6х-0.2=1/5х+1
0.6х-1/5х=0.2+1
2/5х=1.2
Х=1.2÷2/5
Х=3