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Simplifying 15 = 21x Solving 15 = 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. 15 + -21x = 21x + -21x Combine like terms: 21x + -21x = 0 15 + -21x = 0 Add '-15' to each side of the equation. 15 + -15 + -21x = 0 + -15 Combine like terms: 15 + -15 = 0 0 + -21x = 0 + -15 -21x = 0 + -15 Combine like terms: 0 + -15 = -15 -21x = -15 Divide each side by '-21'. x = 0.7142857143 Simplifying x = 0.7142857143
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