Evaluate Using the Given Value 9m+7n if m=-7 and n=4

$9 m + 7 n$ if $m = - 7$ and $n = 4$

Replace the variable $m$ with $- 7$ in the expression.

$9 (- 7) + 7 n$

Replace the variable $n$ with $4$ in the expression.

$9 (- 7) + 7 (4)$

Simplify each term.

Multiply $9$ by $- 7$ .

$- 63 + 7 (4)$

Multiply $7$ by $4$ .

$- 63 + 28$

Add $- 63$ and $28$ .

$- 35$