Evaluate Using the Given Value x+y+y ; use x=9 ; and y=10

$x + y + y$ ; use $x = 9$ ; and $y = 10$

Replace the variable $x$ with $9$ in the expression.

$(9) + y + y$

Replace the variable $y$ with $10$ in the expression.

$9 + 10 + 10$

Remove parentheses.

$9 + 10 + 10$

Add $9$ and $10$ .

$19 + 10$

Add $19$ and $10$ .

$29$