0.9x-250=250乘0.125的解
问题描述:
0.9x-250=250乘0.125的解
答
0.9x - 250 = 250×0.125
0.9x = 250×0.125 + 250
0.9x = 250×(0.125 + 1)
0.9x = 250×1.125
x = 250×1.125÷0.9
x = 312.5