GMAT考试

【单选题】If
and xy=4, then 7y+2x=


网考网参考答案：A
网考网解析：
If you multiply xy times both sides of the first equation, you get 7y+2x=7xy. You know that xy=4, so 7y+2x=7(4)=28. document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>