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Simplifying 13x + 9y = x + -8y Solving 13x + 9y = x + -8y Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1x' to each side of the equation. 13x + -1x + 9y = x + -1x + -8y Combine like terms: 13x + -1x = 12x 12x + 9y = x + -1x + -8y Combine like terms: x + -1x = 0 12x + 9y = 0 + -8y 12x + 9y = -8y Add '-9y' to each side of the equation. 12x + 9y + -9y = -8y + -9y Combine like terms: 9y + -9y = 0 12x + 0 = -8y + -9y 12x = -8y + -9y Combine like terms: -8y + -9y = -17y 12x = -17y Divide each side by '12'. x = -1.416666667y Simplifying x = -1.416666667y
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