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1.9x+1.5=2.1
We move all terms to the left:
1.9x+1.5-(2.1)=0
We add all the numbers together, and all the variables
1.9x-0.6=0
We move all terms containing x to the left, all other terms to the right
1.9x=0.6
x=0.6/1.9
x=0.6/1.9
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