0.75x➖4分之3➗2分之9=0.5怎么算?
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解:解方程, 此方程的解为x = 8/9
0.75x - 3/4 ÷ 9/2 = 0.5
(75/100)x - 3/4 × 2/9 = 5/10
(3/4)x - 1/6 = 1/2
(3/4)x = 1/2 + 1/6
(3/4)x = 3/6 + 1/6
(3/4)x = 4/6
(3/4)x = 2/3
x = 2/3 ÷ 3/4
x = 2/3 × 4/3
∴x = 8/9
答:此方程的解为x = 8/9
0.75x - 3/4 ÷ 9/2 = 0.5
(75/100)x - 3/4 × 2/9 = 5/10
(3/4)x - 1/6 = 1/2
(3/4)x = 1/2 + 1/6
(3/4)x = 3/6 + 1/6
(3/4)x = 4/6
(3/4)x = 2/3
x = 2/3 ÷ 3/4
x = 2/3 × 4/3
∴x = 8/9
答:此方程的解为x = 8/9
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