3w+9=7w-15

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Solution for 3w+9=7w-15 equation:


Simplifying
3w + 9 = 7w + -15

Reorder the terms:
9 + 3w = 7w + -15

Reorder the terms:
9 + 3w = -15 + 7w

Solving
9 + 3w = -15 + 7w

Solving for variable 'w'.

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

Add '-7w' to each side of the equation.
9 + 3w + -7w = -15 + 7w + -7w

Combine like terms: 3w + -7w = -4w
9 + -4w = -15 + 7w + -7w

Combine like terms: 7w + -7w = 0
9 + -4w = -15 + 0
9 + -4w = -15

Add '-9' to each side of the equation.
9 + -9 + -4w = -15 + -9

Combine like terms: 9 + -9 = 0
0 + -4w = -15 + -9
-4w = -15 + -9

Combine like terms: -15 + -9 = -24
-4w = -24

Divide each side by '-4'.
w = 6

Simplifying
w = 6

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