3w-21=-6(w-7)

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Solution for 3w-21=-6(w-7) equation:


Simplifying
3w + -21 = -6(w + -7)

Reorder the terms:
-21 + 3w = -6(w + -7)

Reorder the terms:
-21 + 3w = -6(-7 + w)
-21 + 3w = (-7 * -6 + w * -6)
-21 + 3w = (42 + -6w)

Solving
-21 + 3w = 42 + -6w

Solving for variable 'w'.

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

Add '6w' to each side of the equation.
-21 + 3w + 6w = 42 + -6w + 6w

Combine like terms: 3w + 6w = 9w
-21 + 9w = 42 + -6w + 6w

Combine like terms: -6w + 6w = 0
-21 + 9w = 42 + 0
-21 + 9w = 42

Add '21' to each side of the equation.
-21 + 21 + 9w = 42 + 21

Combine like terms: -21 + 21 = 0
0 + 9w = 42 + 21
9w = 42 + 21

Combine like terms: 42 + 21 = 63
9w = 63

Divide each side by '9'.
w = 7

Simplifying
w = 7

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