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Simplifying -45 + 21x + -9y = 0 Solving -45 + 21x + -9y = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '45' to each side of the equation. -45 + 21x + 45 + -9y = 0 + 45 Reorder the terms: -45 + 45 + 21x + -9y = 0 + 45 Combine like terms: -45 + 45 = 0 0 + 21x + -9y = 0 + 45 21x + -9y = 0 + 45 Combine like terms: 0 + 45 = 45 21x + -9y = 45 Add '9y' to each side of the equation. 21x + -9y + 9y = 45 + 9y Combine like terms: -9y + 9y = 0 21x + 0 = 45 + 9y 21x = 45 + 9y Divide each side by '21'. x = 2.142857143 + 0.4285714286y Simplifying x = 2.142857143 + 0.4285714286y
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