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x/(x-120)=12解出来X等于几?急死了~
We have math ( )Friday morning.
A.on B.in
人气:452 ℃ 时间:2020-04-16 13:19:03
解答
x/(x-120)=12
x=12(x-120)
x=12x-12*120
11x=1440
x=1440\11
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