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If number A minus the produce of 3 times as big as B,the res

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If number A minus the produce of 3 times as big as B,the result will be 51.If number Aplus the sum of 2 times as B ,the sum will be 111.Question:what is what is B
英翻中
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.