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Simplifying 10x + -9y = 8x Solving 10x + -9y = 8x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8x' to each side of the equation. 10x + -8x + -9y = 8x + -8x Combine like terms: 10x + -8x = 2x 2x + -9y = 8x + -8x Combine like terms: 8x + -8x = 0 2x + -9y = 0 Add '9y' to each side of the equation. 2x + -9y + 9y = 0 + 9y Combine like terms: -9y + 9y = 0 2x + 0 = 0 + 9y 2x = 0 + 9y Remove the zero: 2x = 9y Divide each side by '2'. x = 4.5y Simplifying x = 4.5y
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