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Simplifying (-3x + -1y + 7) + (x + 2y + 9) = 0 Reorder the terms: (7 + -3x + -1y) + (x + 2y + 9) = 0 Remove parenthesis around (7 + -3x + -1y) 7 + -3x + -1y + (x + 2y + 9) = 0 Reorder the terms: 7 + -3x + -1y + (9 + x + 2y) = 0 Remove parenthesis around (9 + x + 2y) 7 + -3x + -1y + 9 + x + 2y = 0 Reorder the terms: 7 + 9 + -3x + x + -1y + 2y = 0 Combine like terms: 7 + 9 = 16 16 + -3x + x + -1y + 2y = 0 Combine like terms: -3x + x = -2x 16 + -2x + -1y + 2y = 0 Combine like terms: -1y + 2y = 1y 16 + -2x + 1y = 0 Solving 16 + -2x + 1y = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-16' to each side of the equation. 16 + -2x + -16 + 1y = 0 + -16 Reorder the terms: 16 + -16 + -2x + 1y = 0 + -16 Combine like terms: 16 + -16 = 0 0 + -2x + 1y = 0 + -16 -2x + 1y = 0 + -16 Combine like terms: 0 + -16 = -16 -2x + 1y = -16 Add '-1y' to each side of the equation. -2x + 1y + -1y = -16 + -1y Combine like terms: 1y + -1y = 0 -2x + 0 = -16 + -1y -2x = -16 + -1y Divide each side by '-2'. x = 8 + 0.5y Simplifying x = 8 + 0.5y
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