x-10+x=30

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Solution for x-10+x=30 equation: 



x-10+x=30

We move all terms to the left:

x-10+x-(30)=0

We add all the numbers together, and all the variables

2x-40=0

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

2x=40

x=40/2

x=20

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