3r-1=a

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Solution for 3r-1=a equation: 


Simplifying
3r + -1 = a

Reorder the terms:
-1 + 3r = a

Solving
-1 + 3r = a

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '1' to each side of the equation.
-1 + 1 + 3r = 1 + a

Combine like terms: -1 + 1 = 0
0 + 3r = 1 + a
3r = 1 + a

Divide each side by '3'.
r = 0.3333333333 + 0.3333333333a

Simplifying
r = 0.3333333333 + 0.3333333333a

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