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Simplifying 9x + 21 + 8y = 0 Reorder the terms: 21 + 9x + 8y = 0 Solving 21 + 9x + 8y = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + 9x + -21 + 8y = 0 + -21 Reorder the terms: 21 + -21 + 9x + 8y = 0 + -21 Combine like terms: 21 + -21 = 0 0 + 9x + 8y = 0 + -21 9x + 8y = 0 + -21 Combine like terms: 0 + -21 = -21 9x + 8y = -21 Add '-8y' to each side of the equation. 9x + 8y + -8y = -21 + -8y Combine like terms: 8y + -8y = 0 9x + 0 = -21 + -8y 9x = -21 + -8y Divide each side by '9'. x = -2.333333333 + -0.8888888889y Simplifying x = -2.333333333 + -0.8888888889y
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