2.5:1.2=x:3
3个回答
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解:解方程, 此方程的解为x = 25/4,【即x = 6.25】
∵X : Y = X ÷ Y = Z
∴2.5 : 1.2 = x : 3
2.5 ÷ 1.2 = x ÷ 3
(2×10+5)/10 ÷ (1×10+2)/10 = x ÷ 3
25/10 ÷ 12/10 = x ÷ 3
5/2 ÷ 6/5 = x ÷ 3
5/2 × 5/6 = x ÷ 3
25/12 = x ÷ 3
x = 25/12 × 3
x = 25/4
∴x = 6.25
答:此方程的解为x = 25/4,【即x = 6.25】
∵X : Y = X ÷ Y = Z
∴2.5 : 1.2 = x : 3
2.5 ÷ 1.2 = x ÷ 3
(2×10+5)/10 ÷ (1×10+2)/10 = x ÷ 3
25/10 ÷ 12/10 = x ÷ 3
5/2 ÷ 6/5 = x ÷ 3
5/2 × 5/6 = x ÷ 3
25/12 = x ÷ 3
x = 25/12 × 3
x = 25/4
∴x = 6.25
答:此方程的解为x = 25/4,【即x = 6.25】
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