How do you simplify $- 3 (a + 5) + 9$ $-3(a+5)+9$ ?

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How do you simplify $- 3 (a + 5) + 9$ $-3(a+5)+9$ ?

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Answer 1 · 2018-03-21T22:58:57

$- 3 a - 6$ $-3a-6$

Explanation:

$- 3 (a + 5) + 9$ $-3(a+5)+9$
$(- 3 a - 15) + 9$ $(-3a-15)+9$ $Distributive property: - 3 \cdot a and - 3 \cdot 5$ $color(blue)(" Distributive property: "-3*a and -3*5)$
$- 3 a - 15 + 9$ $-3a-15+9$ $Remove parentheses to make it more readable$ $color(blue)(" Remove parentheses to make it more readable")$
$- 3 a - 6$ $-3a-6$ $Add like terms: - 15 + 9 = 6$ $color(blue)(" Add like terms: " -15+9=6)$

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How do you simplify $- 3 (a + 5) + 9$ $-3(a+5)+9$ ?

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How do you simplify $- 3 (a + 5) + 9$ $-3(a+5)+9$ ?