21=2.5x+1

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Solution for 21=2.5x+1 equation:


21=2.5x+1

We simplify the equation to the form, which is simple to understand 
21=2.5x+1

We move all terms containing x to the left and all other terms to the right. 
-2.5x=+1-21

We simplify left and right side of the equation. 
-2.5x=-20

We divide both sides of the equation by -02.5 to get x. 
x=8

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