12+x=20+10

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Solution for 12+x=20+10 equation: 



12+x=20+10

We move all terms to the left:

12+x-(20+10)=0

We add all the numbers together, and all the variables

x+12-30=0

We add all the numbers together, and all the variables

x-18=0

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

x=18

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