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Simplifying 7 = 21x + 25 Reorder the terms: 7 = 25 + 21x Solving 7 = 25 + 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. 7 + -21x = 25 + 21x + -21x Combine like terms: 21x + -21x = 0 7 + -21x = 25 + 0 7 + -21x = 25 Add '-7' to each side of the equation. 7 + -7 + -21x = 25 + -7 Combine like terms: 7 + -7 = 0 0 + -21x = 25 + -7 -21x = 25 + -7 Combine like terms: 25 + -7 = 18 -21x = 18 Divide each side by '-21'. x = -0.8571428571 Simplifying x = -0.8571428571
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