2w+6w-15=129

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Solution for 2w+6w-15=129 equation:


Simplifying
2w + 6w + -15 = 129

Reorder the terms:
-15 + 2w + 6w = 129

Combine like terms: 2w + 6w = 8w
-15 + 8w = 129

Solving
-15 + 8w = 129

Solving for variable 'w'.

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

Add '15' to each side of the equation.
-15 + 15 + 8w = 129 + 15

Combine like terms: -15 + 15 = 0
0 + 8w = 129 + 15
8w = 129 + 15

Combine like terms: 129 + 15 = 144
8w = 144

Divide each side by '8'.
w = 18

Simplifying
w = 18

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