r(2a)=1+3x

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Solution for r(2a)=1+3x equation: 


Simplifying
r(2a) = 1 + 3x

Remove parenthesis around (2a)
r * 2a = 1 + 3x

Reorder the terms for easier multiplication:
2r * a = 1 + 3x

Multiply r * a
2ar = 1 + 3x

Solving
2ar = 1 + 3x

Solving for variable 'a'.

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

Divide each side by '2r'.
a = 0.5r-1 + 1.5r-1x

Simplifying
a = 0.5r-1 + 1.5r-1x

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