8+9+x=31-12

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Solution for 8+9+x=31-12 equation:



8+9+x=31-12
We move all terms to the left:
8+9+x-(31-12)=0
We add all the numbers together, and all the variables
x+8+9-19=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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