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We are given an expression:
[tex]x+y+y[/tex]We need to evaluate this expression for x =9 and y =10. Here, evaluation simply means substituting the given values of x and y into the given expression. Lets do this:
Repalcing x by 9 and y by 10, we get the following result:
[tex]\textcolor{#FF7968}{x+y+y=9+10+10=29}[/tex]This means, the given expression simplifies to 29, for the given values of x and y.