21-4p=7-2p

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Solution for 21-4p=7-2p equation:


Simplifying
21 + -4p = 7 + -2p

Solving
21 + -4p = 7 + -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.
21 + -4p + 2p = 7 + -2p + 2p

Combine like terms: -4p + 2p = -2p
21 + -2p = 7 + -2p + 2p

Combine like terms: -2p + 2p = 0
21 + -2p = 7 + 0
21 + -2p = 7

Add '-21' to each side of the equation.
21 + -21 + -2p = 7 + -21

Combine like terms: 21 + -21 = 0
0 + -2p = 7 + -21
-2p = 7 + -21

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

Divide each side by '-2'.
p = 7

Simplifying
p = 7

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