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(2.1x-1.8=24)
We move all terms to the left:
(2.1x-1.8-(24))=0
We add all the numbers together, and all the variables
(2.1x-25.8)=0
We get rid of parentheses
2.1x-25.8=0
We move all terms containing x to the left, all other terms to the right
2.1x=25.8
x=25.8/2.1
x=12+0.6/2.1
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