2*p-q-2*r=-1

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Solution for 2*p-q-2*r=-1 equation:


Simplifying
2p + -1q + -2r = -1

Solving
2p + -1q + -2r = -1

Solving for variable 'p'.

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

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

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

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

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

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

Simplifying
p = -0.5 + 0.5q + r

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