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x+x+x=12.50
We move all terms to the left:
x+x+x-(12.50)=0
We add all the numbers together, and all the variables
x+x+x-(12.5)=0
We add all the numbers together, and all the variables
3x-12.5=0
We move all terms containing x to the left, all other terms to the right
3x=12.5
x=12.5/3
x=4+0.5/3
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