3(x+7)=4x+9

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Solution for 3(x+7)=4x+9 equation: 



3(x+7)=4x+9

We move all terms to the left:

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

We multiply parentheses

3x-(4x+9)+21=0

We get rid of parentheses

3x-4x-9+21=0

We add all the numbers together, and all the variables

-1x+12=0

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

-x=-12

x=-12/-1

x=+12

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