x+15%x=3.22 ,1/2x-25%x=10 ,x*(1-37.7%)=5/8 ,40%x=16 ,19-120%x=7 ,50%x=22解方程
问题描述：
x+15%x=3.22 ,1/2x-25%x=10 ,x*(1-37.7%)=5/8 ,40%x=16 ,19-120%x=7 ,50%x=22解方程
答
x+15%x=3.22 , x=2.8
1/2x-25%x=10 , x=2/15
,x*(1-37.7%)=5/8 , x=5/8(1-37.7%)≈1
,40%x=16 ，x =40
19-120%x=7, x=10
,50%x=22, x=44
答
x+15%x=3.22 ,0.15x= 3.22x= 322/151/2x-25%x=10 ,0.5x- 0.25x =100.25x =10x= 40x*(1-37.7%)=5/80.623x= 0.625x=1,40%x=16 ,0.4x = 16x= 4019-120%x=7 ,19- 1.2x = 71.2x = 12x= 1050%x=22x= 22×2x= 44