1.2/2.5＝3/x

Question

如题所述

Answer 1

解：解方程，此方程的解为x = 25/4,【即x = 6.25】
∵X ： Y = X ÷ Y = Z
∴1.2 / 2.5 ＝ 3 / x
1.2 ÷ 2.5 = 3 ÷ x
（1×10+2）/10 ÷ （2×10+5）/10 = 3 ÷ x

12/10 ÷ 25/10 = 3 ÷ x
6/5 ÷ 5/2 = 3 ÷ x
6/5 × 2/5 = 3 ÷ x
12/25 = 3 ÷ x
x = 3 ÷ 12/25
x = 3 × 25/12
x = 25/4
∴x = 6.25
答：此方程的解为x = 25/4,【即x = 6.25】

Answer 2

1.2/2.5＝3/ x
解:1.2x=2.5*3
1.2x=7.5
x=6.25

Answer 3

1.2/2.5=3/X

1.2X=3x2.5
1.2X=7.5
X=6.25

Answer 4

2.5×3＝1.2x
x＝6.25