R+3r-2r=18

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Solution for R+3r-2r=18 equation: 


Simplifying
R + 3r + -2r = 18

Combine like terms: 3r + -2r = 1r
R + 1r = 18

Solving
R + 1r = 18

Solving for variable 'R'.

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

Add '-1r' to each side of the equation.
R + 1r + -1r = 18 + -1r

Combine like terms: 1r + -1r = 0
R + 0 = 18 + -1r
R = 18 + -1r

Simplifying
R = 18 + -1r

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