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y = 12/3
y = 4
pers.yg ekuivalen :
a) y+1 = 4
y = 4-1
y = 3 (salah)
b) y-1 = 15
y = 15+1
y = 16 ( salah)
c) 2y = 8
y = 8/2
y = 4 (benar)
d) 2+y = 8
y = 8-2
y = 6 ( salah)
jadi, jwaban yg tepat adalah C.2y = 8