8w-21=2w-9

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Solution for 8w-21=2w-9 equation:


Simplifying
8w + -21 = 2w + -9

Reorder the terms:
-21 + 8w = 2w + -9

Reorder the terms:
-21 + 8w = -9 + 2w

Solving
-21 + 8w = -9 + 2w

Solving for variable 'w'.

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

Add '-2w' to each side of the equation.
-21 + 8w + -2w = -9 + 2w + -2w

Combine like terms: 8w + -2w = 6w
-21 + 6w = -9 + 2w + -2w

Combine like terms: 2w + -2w = 0
-21 + 6w = -9 + 0
-21 + 6w = -9

Add '21' to each side of the equation.
-21 + 21 + 6w = -9 + 21

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

Combine like terms: -9 + 21 = 12
6w = 12

Divide each side by '6'.
w = 2

Simplifying
w = 2

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