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