(w+6)(w+2)-w(w+4)=20

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Solution for (w+6)(w+2)-w(w+4)=20 equation:


Simplifying
(w + 6)(w + 2) + -1w(w + 4) = 20

Reorder the terms:
(6 + w)(w + 2) + -1w(w + 4) = 20

Reorder the terms:
(6 + w)(2 + w) + -1w(w + 4) = 20

Multiply (6 + w) * (2 + w)
(6(2 + w) + w(2 + w)) + -1w(w + 4) = 20
((2 * 6 + w * 6) + w(2 + w)) + -1w(w + 4) = 20
((12 + 6w) + w(2 + w)) + -1w(w + 4) = 20
(12 + 6w + (2 * w + w * w)) + -1w(w + 4) = 20
(12 + 6w + (2w + w2)) + -1w(w + 4) = 20

Combine like terms: 6w + 2w = 8w
(12 + 8w + w2) + -1w(w + 4) = 20

Reorder the terms:
12 + 8w + w2 + -1w(4 + w) = 20
12 + 8w + w2 + (4 * -1w + w * -1w) = 20
12 + 8w + w2 + (-4w + -1w2) = 20

Reorder the terms:
12 + 8w + -4w + w2 + -1w2 = 20

Combine like terms: 8w + -4w = 4w
12 + 4w + w2 + -1w2 = 20

Combine like terms: w2 + -1w2 = 0
12 + 4w + 0 = 20
12 + 4w = 20

Solving
12 + 4w = 20

Solving for variable 'w'.

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

Add '-12' to each side of the equation.
12 + -12 + 4w = 20 + -12

Combine like terms: 12 + -12 = 0
0 + 4w = 20 + -12
4w = 20 + -12

Combine like terms: 20 + -12 = 8
4w = 8

Divide each side by '4'.
w = 2

Simplifying
w = 2

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