-7w+21=3w-9

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Solution for -7w+21=3w-9 equation:


Simplifying
-7w + 21 = 3w + -9

Reorder the terms:
21 + -7w = 3w + -9

Reorder the terms:
21 + -7w = -9 + 3w

Solving
21 + -7w = -9 + 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 + -7w + -3w = -9 + 3w + -3w

Combine like terms: -7w + -3w = -10w
21 + -10w = -9 + 3w + -3w

Combine like terms: 3w + -3w = 0
21 + -10w = -9 + 0
21 + -10w = -9

Add '-21' to each side of the equation.
21 + -21 + -10w = -9 + -21

Combine like terms: 21 + -21 = 0
0 + -10w = -9 + -21
-10w = -9 + -21

Combine like terms: -9 + -21 = -30
-10w = -30

Divide each side by '-10'.
w = 3

Simplifying
w = 3

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