解:解方程,此方程的解为x = 40
x + 百分之20 = 48
x + (20/100)x = 48
x + (1/5)x = 48
( 5/5)x + (1/5)x = 48
(6/5)x = 48
x = 48 ÷ 6/5
x = 48 × 5/6
∴x = 40
答:此方程的解为x = 40
x+20℅x=48
解:120%x=48
x=48÷1.2
x=40
解方程X+20%x=48
X+20%X=48
解:(1+20%)X=48
1.2X=48
X=40