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kalo soalnya -x-x=-8
-2x =-8
x = -8/-2= 4
2n-5=3
2n = 8
n = 8/2=4
2p+p=12
3p =12
p = 12/3=4
3q+8=q
3q-q =-8
2q = -8
q = -8/2 =-4