
7/2x×5/2÷5/4-1=3怎么解?
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解:解方程, 此方程的解为x = 4/7
(7/2)x × 5/2 ÷ 5/4 - 1 = 3
(7/2)x × 5/2 × 4/5 = 3 + 1
(7/2)x × 2 = 4
7x = 4
x = 4 ÷ 7
x = 4 × 1/7
∴x = 4/7
答:此方程的解为x = 4/7
(7/2)x × 5/2 ÷ 5/4 - 1 = 3
(7/2)x × 5/2 × 4/5 = 3 + 1
(7/2)x × 2 = 4
7x = 4
x = 4 ÷ 7
x = 4 × 1/7
∴x = 4/7
答:此方程的解为x = 4/7
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