-18p-5(4-5p)=4(p-2)-21

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Solution for -18p-5(4-5p)=4(p-2)-21 equation:


Simplifying
-18p + -5(4 + -5p) = 4(p + -2) + -21
-18p + (4 * -5 + -5p * -5) = 4(p + -2) + -21
-18p + (-20 + 25p) = 4(p + -2) + -21

Reorder the terms:
-20 + -18p + 25p = 4(p + -2) + -21

Combine like terms: -18p + 25p = 7p
-20 + 7p = 4(p + -2) + -21

Reorder the terms:
-20 + 7p = 4(-2 + p) + -21
-20 + 7p = (-2 * 4 + p * 4) + -21
-20 + 7p = (-8 + 4p) + -21

Reorder the terms:
-20 + 7p = -8 + -21 + 4p

Combine like terms: -8 + -21 = -29
-20 + 7p = -29 + 4p

Solving
-20 + 7p = -29 + 4p

Solving for variable 'p'.

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

Add '-4p' to each side of the equation.
-20 + 7p + -4p = -29 + 4p + -4p

Combine like terms: 7p + -4p = 3p
-20 + 3p = -29 + 4p + -4p

Combine like terms: 4p + -4p = 0
-20 + 3p = -29 + 0
-20 + 3p = -29

Add '20' to each side of the equation.
-20 + 20 + 3p = -29 + 20

Combine like terms: -20 + 20 = 0
0 + 3p = -29 + 20
3p = -29 + 20

Combine like terms: -29 + 20 = -9
3p = -9

Divide each side by '3'.
p = -3

Simplifying
p = -3

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