2-(-p)=21

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Solution for 2-(-p)=21 equation: 


Simplifying
2 + -1(-1p) = 21

Remove parenthesis around (-1p)
2 + -1 * -1p = 21

Multiply -1 * -1
2 + 1p = 21

Solving
2 + 1p = 21

Solving for variable 'p'.

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

Add '-2' to each side of the equation.
2 + -2 + 1p = 21 + -2

Combine like terms: 2 + -2 = 0
0 + 1p = 21 + -2
1p = 21 + -2

Combine like terms: 21 + -2 = 19
1p = 19

Divide each side by '1'.
p = 19

Simplifying
p = 19

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