r=w-b(2c+b)

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Solution for r=w-b(2c+b) equation: 


Simplifying
r = w + -1b(2c + b)

Reorder the terms:
r = w + -1b(b + 2c)
r = w + (b * -1b + 2c * -1b)

Reorder the terms:
r = w + (-2bc + -1b2)
r = w + (-2bc + -1b2)

Reorder the terms:
r = -2bc + -1b2 + w

Solving
r = -2bc + -1b2 + w

Solving for variable 'r'.

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

Simplifying
r = -2bc + -1b2 + w

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