8s-1=9s-6 15z+24=-5z-5 18-8y=5y-8 help ! :)
8s-1=9s-6
8s -9s = -6+1
-s=-5
s=5
15z+24=-5z-5
15z+5z=-5-24
20z=-29
z=-29/20
z=-1 i 9/20
18-8y=5y-8
-8y-5y=-8-18
-13y = -26
y=2
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8s-1=9s-6
8s -9s = -6+1
-s=-5
s=5
15z+24=-5z-5
15z+5z=-5-24
20z=-29
z=-29/20
z=-1 i 9/20
18-8y=5y-8
-8y-5y=-8-18
-13y = -26
y=2