Ice: Simplify 15-(2x-3)
-(2x-3)
= -1(2x-3)
= -1*2x - -1*3
= -2x + 3
so 15 -(2x-3)
=15 + -(2x-3)
=15 + -2x+3
= 15 - 2x +3
= 18 - 2x
I have gone about this the really really long way. I just wanted to show you where Millie's answer cam from.
If you multiply a bracket by a negative number all the terms inside the bracket will change their sign. This is the shorcut method.
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