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3y-6y=15
-3y=15
y=-5
b. 9-2p=4p-6
9+6=4p+2p
15=6p
p=15/6 atau 5/2
3y-6y=15
-3y=15
y=15/-3=-5
b. 9-2p=4p-6
-2p-4p=-6-9
-6p=-15
p=-15/-6
p= 5/2