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Simplifying 14x + 9 + -21x = 30 Reorder the terms: 9 + 14x + -21x = 30 Combine like terms: 14x + -21x = -7x 9 + -7x = 30 Solving 9 + -7x = 30 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -7x = 30 + -9 Combine like terms: 9 + -9 = 0 0 + -7x = 30 + -9 -7x = 30 + -9 Combine like terms: 30 + -9 = 21 -7x = 21 Divide each side by '-7'. x = -3 Simplifying x = -3
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