b-c-d=r

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Solution for b-c-d=r equation: 


Simplifying
b + -1c + -1d = r

Solving
b + -1c + -1d = r

Solving for variable 'b'.

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

Add 'c' to each side of the equation.
b + -1c + c + -1d = c + r

Combine like terms: -1c + c = 0
b + 0 + -1d = c + r
b + -1d = c + r

Add 'd' to each side of the equation.
b + -1d + d = c + d + r

Combine like terms: -1d + d = 0
b + 0 = c + d + r
b = c + d + r

Simplifying
b = c + d + r

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