x比20等于16-x比16,求x的值
人气:245 ℃ 时间:2020-02-02 23:44:09
解答
x :20 = (16-x) :16
内项积等于外项积
16x=20(16-x)
16x=320-20x
16x+20x=320
36x=320
x=320÷36
x=80/9(9分之80)
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