3x+9=7x-20

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Solution for 3x+9=7x-20 equation: 



3x+9=7x-20

We move all terms to the left:

3x+9-(7x-20)=0

We get rid of parentheses

3x-7x+20+9=0

We add all the numbers together, and all the variables

-4x+29=0

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

-4x=-29

x=-29/-4

x=7+1/4

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