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Simplifying x2 + 7w + -9 = -21 Reorder the terms: -9 + 7w + x2 = -21 Solving -9 + 7w + x2 = -21 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 7w + 9 + x2 = -21 + 9 Reorder the terms: -9 + 9 + 7w + x2 = -21 + 9 Combine like terms: -9 + 9 = 0 0 + 7w + x2 = -21 + 9 7w + x2 = -21 + 9 Combine like terms: -21 + 9 = -12 7w + x2 = -12 Add '-1x2' to each side of the equation. 7w + x2 + -1x2 = -12 + -1x2 Combine like terms: x2 + -1x2 = 0 7w + 0 = -12 + -1x2 7w = -12 + -1x2 Divide each side by '7'. w = -1.714285714 + -0.1428571429x2 Simplifying w = -1.714285714 + -0.1428571429x2
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