24zolas
24zolas
15-11-2018
Mathematics
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How do I do -9+-2x+9x-1
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crimm581
crimm581
15-11-2018
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.
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gmany
gmany
15-11-2018
[tex]-9+(-2x)+9x-1\qquad\text{combine like terms}\\\\=(-2x+9x)+(-9-1)=\boxed{7x-10}[/tex]
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