3x+13+x+20=7x-15

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Solution for 3x+13+x+20=7x-15 equation: 



3x+13+x+20=7x-15

We move all terms to the left:

3x+13+x+20-(7x-15)=0

We add all the numbers together, and all the variables

4x-(7x-15)+33=0

We get rid of parentheses

4x-7x+15+33=0

We add all the numbers together, and all the variables

-3x+48=0

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

-3x=-48

x=-48/-3

x=+16

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