3x-7=5x+9=4x

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Solution for 3x-7=5x+9=4x equation: 



3x-7=5x+9=4x

We move all terms to the left:

3x-7-(5x+9)=0

We get rid of parentheses

3x-5x-9-7=0

We add all the numbers together, and all the variables

-2x-16=0

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

-2x=16

x=16/-2

x=-8

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