5x+3(x-4)=7x+9

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Solution for 5x+3(x-4)=7x+9 equation: 



5x+3(x-4)=7x+9

We move all terms to the left:

5x+3(x-4)-(7x+9)=0

We multiply parentheses

5x+3x-(7x+9)-12=0

We get rid of parentheses

5x+3x-7x-9-12=0

We add all the numbers together, and all the variables

x-21=0

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

x=21

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