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2-1x=8.4-4.2x
We move all terms to the left:
2-1x-(8.4-4.2x)=0
We add all the numbers together, and all the variables
-1x-(-4.2x+8.4)+2=0
We get rid of parentheses
-1x+4.2x-8.4+2=0
We add all the numbers together, and all the variables
3.2x-6.4=0
We move all terms containing x to the left, all other terms to the right
3.2x=6.4
x=6.4/3.2
x=2
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