养殖场的黑兔只数是白兔的三倍,白兔比黑兔少十四只,黑兔和白兔各多少只?用方程
人气:306 ℃ 时间:2020-02-06 12:57:07
解答
设白兔x只
3x-x=14
2x=14
x=7
3x=21
黑兔21只,白兔7只
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