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Simplifying (7x + -1y) + (2x + 3y) = 0 Remove parenthesis around (7x + -1y) 7x + -1y + (2x + 3y) = 0 Remove parenthesis around (2x + 3y) 7x + -1y + 2x + 3y = 0 Reorder the terms: 7x + 2x + -1y + 3y = 0 Combine like terms: 7x + 2x = 9x 9x + -1y + 3y = 0 Combine like terms: -1y + 3y = 2y 9x + 2y = 0 Solving 9x + 2y = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2y' to each side of the equation. 9x + 2y + -2y = 0 + -2y Combine like terms: 2y + -2y = 0 9x + 0 = 0 + -2y 9x = 0 + -2y Remove the zero: 9x = -2y Divide each side by '9'. x = -0.2222222222y Simplifying x = -0.2222222222y
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