Question 1128105
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This problem came to the forum long time ago, and I solved it under this link


<A HREF=https://www.algebra.com/algebra/homework/coordinate/word/Linear_Equations_And_Systems_Word_Problems.faq.question.1116821.html>https://www.algebra.com/algebra/homework/coordinate/word/Linear_Equations_And_Systems_Word_Problems.faq.question.1116821.html</A>


https://www.algebra.com/algebra/homework/coordinate/word/Linear_Equations_And_Systems_Word_Problems.faq.question.1116821.html



I got the same answer  as 30 large tiles at $135,


and I believe it is correct until somebody disproves it.



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In Math, &nbsp;somebody's opinion does not matter.


The proof &nbsp;(or disproof) &nbsp;matters.