p+(.5p+3)=21

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Solution for p+(.5p+3)=21 equation:


Simplifying
p + (0.5p + 3) = 21

Reorder the terms:
p + (3 + 0.5p) = 21

Remove parenthesis around (3 + 0.5p)
p + 3 + 0.5p = 21

Reorder the terms:
3 + p + 0.5p = 21

Combine like terms: p + 0.5p = 1.5p
3 + 1.5p = 21

Solving
3 + 1.5p = 21

Solving for variable 'p'.

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

Add '-3' to each side of the equation.
3 + -3 + 1.5p = 21 + -3

Combine like terms: 3 + -3 = 0
0 + 1.5p = 21 + -3
1.5p = 21 + -3

Combine like terms: 21 + -3 = 18
1.5p = 18

Divide each side by '1.5'.
p = 12

Simplifying
p = 12

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