Respuesta :

altavistard

"+-" should always be changed to "-".

You have 3 - 7 - 2.  You may evaluate this from left to right, obtaining -4 -2, or -6.

4 - 16 -2(2) involves multiplication, which must be carried out before addition or subtraction.  Thus, 4 - 16 - 4.  Working from left to right, we get -12 - 4 = -16
Hey kiddo!

So when we simplify the first one we get: -6

When the second one is simplified we get: -16

Have a nice evening and happy learning!
~Brooke

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