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Simplifying -1(3xy + -9) + 3(3xy + 7) = 0 Reorder the terms: -1(-9 + 3xy) + 3(3xy + 7) = 0 (-9 * -1 + 3xy * -1) + 3(3xy + 7) = 0 (9 + -3xy) + 3(3xy + 7) = 0 Reorder the terms: 9 + -3xy + 3(7 + 3xy) = 0 9 + -3xy + (7 * 3 + 3xy * 3) = 0 9 + -3xy + (21 + 9xy) = 0 Reorder the terms: 9 + 21 + -3xy + 9xy = 0 Combine like terms: 9 + 21 = 30 30 + -3xy + 9xy = 0 Combine like terms: -3xy + 9xy = 6xy 30 + 6xy = 0 Solving 30 + 6xy = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-30' to each side of the equation. 30 + -30 + 6xy = 0 + -30 Combine like terms: 30 + -30 = 0 0 + 6xy = 0 + -30 6xy = 0 + -30 Combine like terms: 0 + -30 = -30 6xy = -30 Divide each side by '6y'. x = -5y-1 Simplifying x = -5y-1
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