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2.4=3x-4.2
We move all terms to the left:
2.4-(3x-4.2)=0
We get rid of parentheses
-3x+4.2+2.4=0
We add all the numbers together, and all the variables
-3x+6.6=0
We move all terms containing x to the left, all other terms to the right
-3x=-6.6
x=-6.6/-3
x=2+0.6/3
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