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7x+10=0.5x+55解方程
人气:213 ℃ 时间:2020-01-20 01:07:20
解答
7x-0.5x = 55 - 10
6.5x = 45
x = 45 / 6.5
x = 45÷ (13/2)
x = 45* 2/13
x = 90/13
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