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2.50+x=13.80
We move all terms to the left:
2.50+x-(13.80)=0
We add all the numbers together, and all the variables
x+2.50-(13.8)=0
We add all the numbers together, and all the variables
x-11.3=0
We move all terms containing x to the left, all other terms to the right
x=11.3
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