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tidak jawab : 7x0=0
salah : 30-(20+7)=3x(-1)=-3
nilai agus : 60+0+(-3)=57
benar : 22x3=66
tidak jawab : 5x0=0
salah : 30-(22+5)=3x(-1)=-3
nilai iwan : 66+0+(-3)=63