How do you simplify $(3 a + 4 b) - (- 6 a - 3 b)$ $(3a+4b)-(-6a-3b)$ ?

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Answer 1 · 2015-02-09T12:16:24

You first get rid of the brackets (remembering that the minus sign changes all the signs inside the bracket):

$(3 a + 4 b) - (- 6 a - 3 b) =$ $(3a+4b)-(-6a-3b)=$

$= 3 a + 4 b + 6 a + 3 b =$ $=3a+4b+6a+3b=$
Now you can add together (or subtract) similar terms (that have the same letters):

$= 3 a + 6 a + 4 b + 3 b = 9 a + 7 b$ $=3a+6a+4b+3b=9a+7b$

hope it helps

How do you simplify (3a+4b)-(-6a-3b)(3a+4b)−(−6a−3b)(3a+4b)-(-6a-3b)?