3x+10=x+20,

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Solution for 3x+10=x+20, equation: 



3x+10=x+20.

We move all terms to the left:

3x+10-(x+20.)=0

We add all the numbers together, and all the variables

3x-(x+20)+10=0

We get rid of parentheses

3x-x-20+10=0

We add all the numbers together, and all the variables

2x-10=0

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

2x=10

x=10/2

x=5

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