题目：如果数字A减去B的三倍,结果是51,
如果A加上B的两倍,和为111,A 是多少,B是多少?
跟据题义得式子：A-3*B=51
A+3*B=111
两式相加解得：A=81,所以将A的值代入以上两式中的其中一个,解得B=10.所以
A is eighty-one,B is ten.
If number A minus the produce of 3 times as big as B,the res
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