-21=4(2p-1)+7p

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Solution for -21=4(2p-1)+7p equation:


Simplifying
-21 = 4(2p + -1) + 7p

Reorder the terms:
-21 = 4(-1 + 2p) + 7p
-21 = (-1 * 4 + 2p * 4) + 7p
-21 = (-4 + 8p) + 7p

Combine like terms: 8p + 7p = 15p
-21 = -4 + 15p

Solving
-21 = -4 + 15p

Solving for variable 'p'.

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

Add '-15p' to each side of the equation.
-21 + -15p = -4 + 15p + -15p

Combine like terms: 15p + -15p = 0
-21 + -15p = -4 + 0
-21 + -15p = -4

Add '21' to each side of the equation.
-21 + 21 + -15p = -4 + 21

Combine like terms: -21 + 21 = 0
0 + -15p = -4 + 21
-15p = -4 + 21

Combine like terms: -4 + 21 = 17
-15p = 17

Divide each side by '-15'.
p = -1.133333333

Simplifying
p = -1.133333333

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