Question 1162318
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See the lesson

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/word/evaluation/Miscellaneous-evaluating-problems.lesson>Miscellaneous evaluating problems</A>

in this site, Problem 6.


It is a TWIN problem to your problem.


Read the solution attentively, and then modify the solution to your case.



Happy learning (!)