100(95-x) - 80(100-x) = 100
问题描述:
100(95-x) - 80(100-x) = 100
答
100(95-x) - 80(100-x) = 100 9500-100x-8000+80x=100 -20x=100-1500 -20x=-1400 x=70
100(95-x) - 80(100-x) = 100
100(95-x) - 80(100-x) = 100 9500-100x-8000+80x=100 -20x=100-1500 -20x=-1400 x=70