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2.1=3.5-0.2x
We move all terms to the left:
2.1-(3.5-0.2x)=0
We add all the numbers together, and all the variables
-(-0.2x+3.5)+2.1=0
We get rid of parentheses
0.2x-3.5+2.1=0
We add all the numbers together, and all the variables
0.2x-1.4=0
We move all terms containing x to the left, all other terms to the right
0.2x=1.4
x=1.4/0.2
x=6+0.2/0.2
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