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Simplifying -8x + 9y = -21 Solving -8x + 9y = -21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9y' to each side of the equation. -8x + 9y + -9y = -21 + -9y Combine like terms: 9y + -9y = 0 -8x + 0 = -21 + -9y -8x = -21 + -9y Divide each side by '-8'. x = 2.625 + 1.125y Simplifying x = 2.625 + 1.125y
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