x+7=12-7

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Solution for x+7=12-7 equation: 



x+7=12-7

We move all terms to the left:

x+7-(12-7)=0

We add all the numbers together, and all the variables

x+7-5=0

We add all the numbers together, and all the variables

x+2=0

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

x=-2

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