60×0.8+1.2×(X-60)=0.88X 48+1.2x-72=0.88x1.2x-0.88x=72-480.32x=24x=75
60×0.8+1.2×(X-60)=0.88X 48+1.2x-72=0.88x1.2x-0.88x=320.32x=32x=32/0.32x=100