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-8z=1/:(-8)
z=-1/8
2. 25m-3=24m-4
m=-1
3. -s+15=4s-14
-5s= -29/:(-5)
s=-5 4/5
4. 17y+28=19y+27
-2y=-1/:(-2)
y=1/2
5. 8k-19=-8k+19
16k=38/:16
k=2 3/8
Sorry że bez sprawdzenia