13-5x=8-2x
13-8=5x-2x
5=3x
x=5/3
4y+15=6y+17
4y-6y=17-15
-2y=2
y=-1
5x+(3x-7)=9
5x+3x-7=9
8x=16
x=16/8
x=2
13-5x=8-2x
13-8=5x-2x
5=3x
x=5/3
4y+15=6y+17
4y-6y=17-15
-2y=2
y=-1
5x+(3x-7)=9
5x+3x-7=9
8x=16
x=16/8
x=2
-5х+2х=-13+8
-3х=-5
х=-5:(-3)
х=5/3=1 2/3
4у+15=6у+17
4у-6у=-15+17
-2у=2
У=-2:2
У=-1
5х+(3х-7)=9
5х+3х-7=9
5х+3х=7+9
8х=16
Х=16:8
Х=2