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6.21=3.44+x=
We move all terms to the left:
6.21-(3.44+x)=0
We add all the numbers together, and all the variables
-(x+3.44)+6.21=0
We get rid of parentheses
-x-3.44+6.21=0
We add all the numbers together, and all the variables
-1x+2.77=0
We move all terms containing x to the left, all other terms to the right
-x=-2.77
x=-2.77/-1
x=2+0.77/1
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