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Simplifying 21x + -11 + -4 = 18 Reorder the terms: -11 + -4 + 21x = 18 Combine like terms: -11 + -4 = -15 -15 + 21x = 18 Solving -15 + 21x = 18 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 15 + 21x = 18 + 15 Combine like terms: -15 + 15 = 0 0 + 21x = 18 + 15 21x = 18 + 15 Combine like terms: 18 + 15 = 33 21x = 33 Divide each side by '21'. x = 1.571428571 Simplifying x = 1.571428571
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