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0.55x+6.99=12.49
We move all terms to the left:
0.55x+6.99-(12.49)=0
We add all the numbers together, and all the variables
0.55x-5.5=0
We move all terms containing x to the left, all other terms to the right
0.55x=5.5
x=5.5/0.55
x=10
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