How do you simplify $- (6 a + 6) - 3 (a - 7)$ $-( 6a + 6) - 3( a - 7)$ ?

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Answer 1 · 2017-02-15T14:34:33

$15 - 9 a$ $15 - 9a$

$- (6 a + 6) - 3 (a - 7) = - 6 a - 6 - 3 a + 21 = 15 - 9 a$ $-(6a + 6) - 3(a - 7) = - 6a - 6 - 3a + 21 = 15 - 9a$

How do you simplify −(6a+6)−3(a−7)-( 6a + 6) - 3( a - 7)?