x×80%=80.求x等于多少,x × 5 = 100×75%x+10%=3.3全部求未知数x多少
问题描述:
x×80%=80.求x等于多少,
x × 5 = 100×75%
x+10%=3.3
全部求未知数x多少
答
x×80%=80
0.8x=80
x=80÷0.8
x=100
x × 5 = 100×75%
x × 5 = 75
x=75÷5
x=15
x+10%=3.3
x=3.3-0.1
x=3.2
答
x×80%=80
X=80÷80%
X=100
x × 5 = 100×75%
5X=75
X=25
x+10%=3.3
X+0.1=3.3
X=3.2