七色彩虹之毛毛
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2021-07-19
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解:
解方程,此方程的解为x = 28
50 - x - x ÷ 2 = 8
50 - x - x × 1/2 = 8
50 - x - (1/2)x = 8
50 - (2/2)x - (1/2)x = 8
50 - (3/2)x = 8
(3/2)x = 50 - 8
(3/2)x = 42
x = 42 ÷ 3/2
x = 42 × 2/3
∴x = 28
答:此方程的解为x = 28
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