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2.10+x+5=49.10
We move all terms to the left:
2.10+x+5-(49.10)=0
We add all the numbers together, and all the variables
x+2.10+5-(49.1)=0
We add all the numbers together, and all the variables
x-42=0
We move all terms containing x to the left, all other terms to the right
x=42
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