x+3x-4=9x+7

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



x+3x-4=9x+7

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

4x-9x-7-4=0

We add all the numbers together, and all the variables

-5x-11=0

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

-5x=11

x=11/-5

x=-2+1/5

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