3x-5=5x+7=90

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Solution for 3x-5=5x+7=90 equation: 



3x-5=5x+7=90

We move all terms to the left:

3x-5-(5x+7)=0

We get rid of parentheses

3x-5x-7-5=0

We add all the numbers together, and all the variables

-2x-12=0

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

-2x=12

x=12/-2

x=-6

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