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x=8.21/2.5
We move all terms to the left:
x-(8.21/2.5)=0
We add all the numbers together, and all the variables
x-(+8.21/2.5)=0
We get rid of parentheses
x-8.21/2.5=0
We multiply all the terms by the denominator
x*2.5-8.21=0
Wy multiply elements
2.5x-8.21=0
We move all terms containing x to the left, all other terms to the right
2.5x=8.21
x=8.21/2.5
x=3+0.71/2.5
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