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Simplifying (x + -2) * 2 + (y + -7.5) * 2 = r Reorder the terms: (-2 + x) * 2 + (y + -7.5) * 2 = r Reorder the terms for easier multiplication: 2(-2 + x) + (y + -7.5) * 2 = r (-2 * 2 + x * 2) + (y + -7.5) * 2 = r (-4 + 2x) + (y + -7.5) * 2 = r Reorder the terms: -4 + 2x + (-7.5 + y) * 2 = r Reorder the terms for easier multiplication: -4 + 2x + 2(-7.5 + y) = r -4 + 2x + (-7.5 * 2 + y * 2) = r -4 + 2x + (-15 + 2y) = r Reorder the terms: -4 + -15 + 2x + 2y = r Combine like terms: -4 + -15 = -19 -19 + 2x + 2y = r Solving -19 + 2x + 2y = r Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '19' to each side of the equation. -19 + 2x + 19 + 2y = 19 + r Reorder the terms: -19 + 19 + 2x + 2y = 19 + r Combine like terms: -19 + 19 = 0 0 + 2x + 2y = 19 + r 2x + 2y = 19 + r Add '-2y' to each side of the equation. 2x + 2y + -2y = 19 + r + -2y Combine like terms: 2y + -2y = 0 2x + 0 = 19 + r + -2y 2x = 19 + r + -2y Divide each side by '2'. x = 9.5 + 0.5r + -1y Simplifying x = 9.5 + 0.5r + -1y
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