31=-7w+3(w-3)

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Solution for 31=-7w+3(w-3) equation:


Simplifying
31 = -7w + 3(w + -3)

Reorder the terms:
31 = -7w + 3(-3 + w)
31 = -7w + (-3 * 3 + w * 3)
31 = -7w + (-9 + 3w)

Reorder the terms:
31 = -9 + -7w + 3w

Combine like terms: -7w + 3w = -4w
31 = -9 + -4w

Solving
31 = -9 + -4w

Solving for variable 'w'.

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

Add '4w' to each side of the equation.
31 + 4w = -9 + -4w + 4w

Combine like terms: -4w + 4w = 0
31 + 4w = -9 + 0
31 + 4w = -9

Add '-31' to each side of the equation.
31 + -31 + 4w = -9 + -31

Combine like terms: 31 + -31 = 0
0 + 4w = -9 + -31
4w = -9 + -31

Combine like terms: -9 + -31 = -40
4w = -40

Divide each side by '4'.
w = -10

Simplifying
w = -10

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