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x/0.2=3x+2.1
We move all terms to the left:
x/0.2-(3x+2.1)=0
We get rid of parentheses
x/0.2-3x-2.1=0
We multiply all the terms by the denominator
x-3x*0.2-(2.1)*0.2=0
We add all the numbers together, and all the variables
x-3x*0.2-0.42=0
Wy multiply elements
x-0.6x-0.42=0
We add all the numbers together, and all the variables
0.4x-0.42=0
We move all terms containing x to the left, all other terms to the right
0.4x=0.42
x=0.42/0.4
x=1+0.02/0.4
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