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a-y=20:-1 y= -20
b -y=-17+8=-y=-9:-1=9 y=9
c-y=92-36=-y=57:-1 y -56
d-4y=-20:-4 y -5
e 70=10y 70:10 y= 7
-y=20 /-1
y=-20
b) -y=-17+8
-y=-9 /-1
y=9
c) -y=92-36
-y=56 /-1
y=-56
d) 4y=5-25
4y=-20 /4
y=-5
e) 70:y=20-10
70:y=10 /*y
70=10y /10
y=7
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