2x-9+7x=90

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Solution for 2x-9+7x=90 equation: 



2x-9+7x=90

We move all terms to the left:

2x-9+7x-(90)=0

We add all the numbers together, and all the variables

9x-99=0

We move all terms containing x to the left, all other terms to the right

9x=99

x=99/9

x=11

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