1.2比8.4等于3.6比x怎么解?
3个回答
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解:解方程, 此方程的解为x = 126/5,【即x = 25.2】
∵X : Y = X ÷ Y = Z
∴1.2 : 8.4 = 3.6 : x
1.2 ÷ 8.4 = 3.6 ÷ x
(1×10+2)/10 ÷ (8×10+4)/10 = (3×10+6)/10 ÷ x
12/10 ÷ 84/10 = 36/10 ÷ x
6/5 ÷ 42/5 = 18/5 ÷ x
6/5 × 5/42 = 18/5 ÷ x
1/7 = 18/5 ÷ x
x = 18/5 ÷ 1/7
x = 18/5 × 7
x = 126/5
∴x = 25.2
答:此方程的解为x = 126/5,【即x = 25.2】
∵X : Y = X ÷ Y = Z
∴1.2 : 8.4 = 3.6 : x
1.2 ÷ 8.4 = 3.6 ÷ x
(1×10+2)/10 ÷ (8×10+4)/10 = (3×10+6)/10 ÷ x
12/10 ÷ 84/10 = 36/10 ÷ x
6/5 ÷ 42/5 = 18/5 ÷ x
6/5 × 5/42 = 18/5 ÷ x
1/7 = 18/5 ÷ x
x = 18/5 ÷ 1/7
x = 18/5 × 7
x = 126/5
∴x = 25.2
答:此方程的解为x = 126/5,【即x = 25.2】
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