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X-4.200=8.000X=
We move all terms to the left:
X-4.200-(8.000X)=0
We add all the numbers together, and all the variables
X-(+8.000X)-4.200=0
We add all the numbers together, and all the variables
X-(+8.000X)-4.2=0
We get rid of parentheses
X-8.000X-4.2=0
We add all the numbers together, and all the variables
-7X-4.2=0
We move all terms containing X to the left, all other terms to the right
-7X=4.2
X=4.2/-7
X=-3.5/5.8333333333333
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