w+1-4w+8=21

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Solution for w+1-4w+8=21 equation:


Simplifying
w + 1 + -4w + 8 = 21

Reorder the terms:
1 + 8 + w + -4w = 21

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

Combine like terms: w + -4w = -3w
9 + -3w = 21

Solving
9 + -3w = 21

Solving for variable 'w'.

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

Add '-9' to each side of the equation.
9 + -9 + -3w = 21 + -9

Combine like terms: 9 + -9 = 0
0 + -3w = 21 + -9
-3w = 21 + -9

Combine like terms: 21 + -9 = 12
-3w = 12

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

Simplifying
w = -4

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