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数学
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(2/9x+15):【x-(2/9x+15)】=1:1
人气:452 ℃ 时间:2020-03-24 22:08:50
解答
(2/9x+15):【x-(2/9x+15)】=1:1
2/9x+15=x-(2/9x+15)
2/9x+15=x-2/9x-15
2/9x-x+2/9x=-15-15
-5/9x=-30
x=30/(5/9)
x=45
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