-2a+p=r

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Solution for -2a+p=r equation: 


Simplifying
-2a + p = r

Solving
-2a + p = r

Solving for variable 'a'.

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

Add '-1p' to each side of the equation.
-2a + p + -1p = -1p + r

Combine like terms: p + -1p = 0
-2a + 0 = -1p + r
-2a = -1p + r

Divide each side by '-2'.
a = 0.5p + -0.5r

Simplifying
a = 0.5p + -0.5r

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