21=1-4(w-2)

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Solution for 21=1-4(w-2) equation:


Simplifying
21 = 1 + -4(w + -2)

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

Combine like terms: 1 + 8 = 9
21 = 9 + -4w

Solving
21 = 9 + -4w

Solving for variable 'w'.

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

Add '4w' to each side of the equation.
21 + 4w = 9 + -4w + 4w

Combine like terms: -4w + 4w = 0
21 + 4w = 9 + 0
21 + 4w = 9

Add '-21' to each side of the equation.
21 + -21 + 4w = 9 + -21

Combine like terms: 21 + -21 = 0
0 + 4w = 9 + -21
4w = 9 + -21

Combine like terms: 9 + -21 = -12
4w = -12

Divide each side by '4'.
w = -3

Simplifying
w = -3

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