r-0.5r=12

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Solution for r-0.5r=12 equation: 


Simplifying
r + -0.5r = 12

Combine like terms: r + -0.5r = 0.5r
0.5r = 12

Solving
0.5r = 12

Solving for variable 'r'.

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

Divide each side by '0.5'.
r = 24

Simplifying
r = 24

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