(13+x)*3=7x-9

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Solution for (13+x)*3=7x-9 equation: 



(13+x)*3=7x-9

We move all terms to the left:

(13+x)*3-(7x-9)=0

We add all the numbers together, and all the variables

(x+13)*3-(7x-9)=0

We multiply parentheses

3x-(7x-9)+39=0

We get rid of parentheses

3x-7x+9+39=0

We add all the numbers together, and all the variables

-4x+48=0

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

-4x=-48

x=-48/-4

x=+12

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