3x+13=7x-15

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Solution for 3x+13=7x-15 equation: 



3x+13=7x-15

We move all terms to the left:

3x+13-(7x-15)=0

We get rid of parentheses

3x-7x+15+13=0

We add all the numbers together, and all the variables

-4x+28=0

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

-4x=-28

x=-28/-4

x=+7

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