3x+9=4x-7=30

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Solution for 3x+9=4x-7=30 equation: 



3x+9=4x-7=30

We move all terms to the left:

3x+9-(4x-7)=0

We get rid of parentheses

3x-4x+7+9=0

We add all the numbers together, and all the variables

-1x+16=0

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

-x=-16

x=-16/-1

x=+16

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