50%x+x=20 x+30%x=52

问题描述:

50%x+x=20 x+30%x=52

50%x+x=20
1.5x=20
3/2x=20
x=20x2/3
x=40/3
x+30%x=52
1.3x=52
x=52÷1.3
x=40