x+x=-x+30

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Solution for x+x=-x+30 equation: 



x+x=-x+30

We move all terms to the left:

x+x-(-x+30)=0

We add all the numbers together, and all the variables

x+x-(-1x+30)=0

We add all the numbers together, and all the variables

2x-(-1x+30)=0

We get rid of parentheses

2x+1x-30=0

We add all the numbers together, and all the variables

3x-30=0

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

3x=30

x=30/3

x=10

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