How do I do -9+-2x+9x-1

asked Feb 17, 2019 99.0k views

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$-9+(-2x)+9x-1\qquad\text{combine like terms}\\\\=(-2x+9x)+(-9-1)=\boxed{7x-10}$

SaintTail answered Feb 18, 2019

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6 votes

you combine like terms.
-2x+9x
whatever answer that is you then combine the like terms -9+-1 the you just make an expression out of them.

Adamjansch answered Feb 22, 2019

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