How do you simplify $-(a-7)$ ?

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Answer 1 · 2015-09-08T04:28:05

$-a+7$

$-(a-7)$

Distribute $-1$ by multiplying $-1$ times the terms inside the parentheses. This will cause both terms inside the parentheses to change sign.

$-(a-7)=-a+7$

How do you simplify -(a-7)-(a-7)?