Question

simplify the expression: -6n + -9(-6n + 7)

Explanation:

Step1: Apply distributive property

$-9(-6n + 7) = 54n - 63$

Step2: Combine like terms

$-6n + 54n - 63 = 48n - 63$ Wait, correction: Original expression is $-6n + (-9)(-6n +7)$ → $-6n + 54n -63 = 48n -63$ (fixed miscalculation earlier)

Step1 (corrected): Distribute -9

$-9(-6n +7) = 54n -63$

Step2 (corrected): Add terms with n

$-6n +54n = 48n$

Step3: Final expression

$48n -63$

Answer:

$-15n - 63$