-21=3(w+8)-8w

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Solution for -21=3(w+8)-8w equation:


Simplifying
-21 = 3(w + 8) + -8w

Reorder the terms:
-21 = 3(8 + w) + -8w
-21 = (8 * 3 + w * 3) + -8w
-21 = (24 + 3w) + -8w

Combine like terms: 3w + -8w = -5w
-21 = 24 + -5w

Solving
-21 = 24 + -5w

Solving for variable 'w'.

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

Add '5w' to each side of the equation.
-21 + 5w = 24 + -5w + 5w

Combine like terms: -5w + 5w = 0
-21 + 5w = 24 + 0
-21 + 5w = 24

Add '21' to each side of the equation.
-21 + 21 + 5w = 24 + 21

Combine like terms: -21 + 21 = 0
0 + 5w = 24 + 21
5w = 24 + 21

Combine like terms: 24 + 21 = 45
5w = 45

Divide each side by '5'.
w = 9

Simplifying
w = 9

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