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

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


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

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

Reorder the terms:
-63 + -9w = -21 + -3w

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

Solving for variable 'w'.

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

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

Combine like terms: -9w + 3w = -6w
-63 + -6w = -21 + -3w + 3w

Combine like terms: -3w + 3w = 0
-63 + -6w = -21 + 0
-63 + -6w = -21

Add '63' to each side of the equation.
-63 + 63 + -6w = -21 + 63

Combine like terms: -63 + 63 = 0
0 + -6w = -21 + 63
-6w = -21 + 63

Combine like terms: -21 + 63 = 42
-6w = 42

Divide each side by '-6'.
w = -7

Simplifying
w = -7

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