3x+87-7x-9=90

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Solution for 3x+87-7x-9=90 equation: 



3x+87-7x-9=90

We move all terms to the left:

3x+87-7x-9-(90)=0

We add all the numbers together, and all the variables

-4x-12=0

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

-4x=12

x=12/-4

x=-3

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