spacebreath
spacebreath
21-04-2017
Mathematics
contestada
(-2n+(-9))-(-7n+(-6))
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Аноним
Аноним
21-04-2017
(-2n+(-9))-(-7n+(-6))
(-2n-9)-(-7n-6)
There is a minus before the parenthesis, so you have to change the sign of the numbers inside the parenthesis
-2n-9+7n+6
5n-3
Answer Link
irspow
irspow
21-04-2017
(-2n-9)-(-7n-6)
-2n-9+7n+6
5n-3
Answer Link
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