-3w-21=9(w+7)

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Solution for -3w-21=9(w+7) equation:


Simplifying
-3w + -21 = 9(w + 7)

Reorder the terms:
-21 + -3w = 9(w + 7)

Reorder the terms:
-21 + -3w = 9(7 + w)
-21 + -3w = (7 * 9 + w * 9)
-21 + -3w = (63 + 9w)

Solving
-21 + -3w = 63 + 9w

Solving for variable 'w'.

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

Add '-9w' to each side of the equation.
-21 + -3w + -9w = 63 + 9w + -9w

Combine like terms: -3w + -9w = -12w
-21 + -12w = 63 + 9w + -9w

Combine like terms: 9w + -9w = 0
-21 + -12w = 63 + 0
-21 + -12w = 63

Add '21' to each side of the equation.
-21 + 21 + -12w = 63 + 21

Combine like terms: -21 + 21 = 0
0 + -12w = 63 + 21
-12w = 63 + 21

Combine like terms: 63 + 21 = 84
-12w = 84

Divide each side by '-12'.
w = -7

Simplifying
w = -7

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