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X+X-15.50=47.50
We move all terms to the left:
X+X-15.50-(47.50)=0
We add all the numbers together, and all the variables
X+X-15.50-(47.5)=0
We add all the numbers together, and all the variables
2X-63=0
We move all terms containing X to the left, all other terms to the right
2X=63
X=63/2
X=31+1/2
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