20=9w-4w

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Solution for 20=9w-4w equation:


Simplifying
20 = 9w + -4w

Combine like terms: 9w + -4w = 5w
20 = 5w

Solving
20 = 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.
20 + -5w = 5w + -5w

Combine like terms: 5w + -5w = 0
20 + -5w = 0

Add '-20' to each side of the equation.
20 + -20 + -5w = 0 + -20

Combine like terms: 20 + -20 = 0
0 + -5w = 0 + -20
-5w = 0 + -20

Combine like terms: 0 + -20 = -20
-5w = -20

Divide each side by '-5'.
w = 4

Simplifying
w = 4

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