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数学
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(1)(160-x)X10=850-5x
(2)x-40=5/4x+40
人气:126 ℃ 时间:2020-06-07 06:01:45
解答
(1)(160-x)X10=850-5x
1600-10x=850-5x
10x-5x=1600-850
5x=750
x=750÷5
x=150
(2)x-40=5/4x+40
5/4x-x=-40-40
1/4x=-80
x=80×4
x=320
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