5p+2(p-7)=21

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Solution for 5p+2(p-7)=21 equation:


Simplifying
5p + 2(p + -7) = 21

Reorder the terms:
5p + 2(-7 + p) = 21
5p + (-7 * 2 + p * 2) = 21
5p + (-14 + 2p) = 21

Reorder the terms:
-14 + 5p + 2p = 21

Combine like terms: 5p + 2p = 7p
-14 + 7p = 21

Solving
-14 + 7p = 21

Solving for variable 'p'.

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

Add '14' to each side of the equation.
-14 + 14 + 7p = 21 + 14

Combine like terms: -14 + 14 = 0
0 + 7p = 21 + 14
7p = 21 + 14

Combine like terms: 21 + 14 = 35
7p = 35

Divide each side by '7'.
p = 5

Simplifying
p = 5

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