21=-5w+2(w-3)

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Solution for 21=-5w+2(w-3) equation:


Simplifying
21 = -5w + 2(w + -3)

Reorder the terms:
21 = -5w + 2(-3 + w)
21 = -5w + (-3 * 2 + w * 2)
21 = -5w + (-6 + 2w)

Reorder the terms:
21 = -6 + -5w + 2w

Combine like terms: -5w + 2w = -3w
21 = -6 + -3w

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

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

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

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

Combine like terms: -6 + -21 = -27
3w = -27

Divide each side by '3'.
w = -9

Simplifying
w = -9

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