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Simplifying 3y + 8x + -21 = 0 Reorder the terms: -21 + 8x + 3y = 0 Solving -21 + 8x + 3y = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 8x + 21 + 3y = 0 + 21 Reorder the terms: -21 + 21 + 8x + 3y = 0 + 21 Combine like terms: -21 + 21 = 0 0 + 8x + 3y = 0 + 21 8x + 3y = 0 + 21 Combine like terms: 0 + 21 = 21 8x + 3y = 21 Add '-3y' to each side of the equation. 8x + 3y + -3y = 21 + -3y Combine like terms: 3y + -3y = 0 8x + 0 = 21 + -3y 8x = 21 + -3y Divide each side by '8'. x = 2.625 + -0.375y Simplifying x = 2.625 + -0.375y
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