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3.6x-4.2=3.1x
We move all terms to the left:
3.6x-4.2-(3.1x)=0
We add all the numbers together, and all the variables
3.6x-(+3.1x)-4.2=0
We get rid of parentheses
3.6x-3.1x-4.2=0
We add all the numbers together, and all the variables
0.5x-4.2=0
We move all terms containing x to the left, all other terms to the right
0.5x=4.2
x=4.2/0.5
x=8+0.2/0.5
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