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15+5.50x=15+6.50x
We move all terms to the left:
15+5.50x-(15+6.50x)=0
We add all the numbers together, and all the variables
5.50x-(6.50x+15)+15=0
We get rid of parentheses
5.50x-6.50x-15+15=0
We add all the numbers together, and all the variables
-x=0
x=0/-1
x=0
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