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Simplifying (2x + -1) * y = 21 Reorder the terms: (-1 + 2x) * y = 21 Reorder the terms for easier multiplication: y(-1 + 2x) = 21 (-1 * y + 2x * y) = 21 Reorder the terms: (2xy + -1y) = 21 (2xy + -1y) = 21 Solving 2xy + -1y = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add 'y' to each side of the equation. 2xy + -1y + y = 21 + y Combine like terms: -1y + y = 0 2xy + 0 = 21 + y 2xy = 21 + y Divide each side by '2y'. x = 10.5y-1 + 0.5 Simplifying x = 10.5y-1 + 0.5 Reorder the terms: x = 0.5 + 10.5y-1
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