3x+9=7x+9

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Solution for 3x+9=7x+9 equation: 



3x+9=7x+9

We move all terms to the left:

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

We get rid of parentheses

3x-7x-9+9=0

We add all the numbers together, and all the variables

-4x=0

x=0/-4

x=0

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