3x+10=400-10x

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Solution for 3x+10=400-10x equation: 



3x+10=400-10x

We move all terms to the left:

3x+10-(400-10x)=0

We add all the numbers together, and all the variables

3x-(-10x+400)+10=0

We get rid of parentheses

3x+10x-400+10=0

We add all the numbers together, and all the variables

13x-390=0

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

13x=390

x=390/13

x=30

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