30=40-2P

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Solution for 30=40-2P equation:


Simplifying
30 = 40 + -2P

Solving
30 = 40 + -2P

Solving for variable 'P'.

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

Add '2P' to each side of the equation.
30 + 2P = 40 + -2P + 2P

Combine like terms: -2P + 2P = 0
30 + 2P = 40 + 0
30 + 2P = 40

Add '-30' to each side of the equation.
30 + -30 + 2P = 40 + -30

Combine like terms: 30 + -30 = 0
0 + 2P = 40 + -30
2P = 40 + -30

Combine like terms: 40 + -30 = 10
2P = 10

Divide each side by '2'.
P = 5

Simplifying
P = 5

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