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Simplifying 7y + 21x = 0 Reorder the terms: 21x + 7y = 0 Solving 21x + 7y = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7y' to each side of the equation. 21x + 7y + -7y = 0 + -7y Combine like terms: 7y + -7y = 0 21x + 0 = 0 + -7y 21x = 0 + -7y Remove the zero: 21x = -7y Divide each side by '21'. x = -0.3333333333y Simplifying x = -0.3333333333y
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