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Question:

Simplify: 4(−10n+ 5) − 7(7n − 9)

A −89n + 83
Explaination

Use the distributive property to expand the expression. Then combine like terms mentally.
Distribute and combine like terms.
4(−10n+ 5) − 7(7n − 9) = −40n + 20 − 49n + 63
= −89n + 83