2x^2-rx=20

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Solution for 2x^2-rx=20 equation: 


Simplifying
2x2 + -1rx = 20

Reorder the terms:
-1rx + 2x2 = 20

Solving
-1rx + 2x2 = 20

Solving for variable 'r'.

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

Add '-2x2' to each side of the equation.
-1rx + 2x2 + -2x2 = 20 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-1rx + 0 = 20 + -2x2
-1rx = 20 + -2x2

Divide each side by '-1x'.
r = -20x-1 + 2x

Simplifying
r = -20x-1 + 2x

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