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2.5x+1.8=5.1
We move all terms to the left:
2.5x+1.8-(5.1)=0
We add all the numbers together, and all the variables
2.5x-3.3=0
We move all terms containing x to the left, all other terms to the right
2.5x=3.3
x=3.3/2.5
x=1+0.8/2.5
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