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Simplifying 7x + -2(x + -7) + 9(y + -7) = 0 Reorder the terms: 7x + -2(-7 + x) + 9(y + -7) = 0 7x + (-7 * -2 + x * -2) + 9(y + -7) = 0 7x + (14 + -2x) + 9(y + -7) = 0 Reorder the terms: 7x + 14 + -2x + 9(-7 + y) = 0 7x + 14 + -2x + (-7 * 9 + y * 9) = 0 7x + 14 + -2x + (-63 + 9y) = 0 Reorder the terms: 14 + -63 + 7x + -2x + 9y = 0 Combine like terms: 14 + -63 = -49 -49 + 7x + -2x + 9y = 0 Combine like terms: 7x + -2x = 5x -49 + 5x + 9y = 0 Solving -49 + 5x + 9y = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '49' to each side of the equation. -49 + 5x + 49 + 9y = 0 + 49 Reorder the terms: -49 + 49 + 5x + 9y = 0 + 49 Combine like terms: -49 + 49 = 0 0 + 5x + 9y = 0 + 49 5x + 9y = 0 + 49 Combine like terms: 0 + 49 = 49 5x + 9y = 49 Add '-9y' to each side of the equation. 5x + 9y + -9y = 49 + -9y Combine like terms: 9y + -9y = 0 5x + 0 = 49 + -9y 5x = 49 + -9y Divide each side by '5'. x = 9.8 + -1.8y Simplifying x = 9.8 + -1.8y
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