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Simplifying 21x + -9 = 3x + 47 Reorder the terms: -9 + 21x = 3x + 47 Reorder the terms: -9 + 21x = 47 + 3x Solving -9 + 21x = 47 + 3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3x' to each side of the equation. -9 + 21x + -3x = 47 + 3x + -3x Combine like terms: 21x + -3x = 18x -9 + 18x = 47 + 3x + -3x Combine like terms: 3x + -3x = 0 -9 + 18x = 47 + 0 -9 + 18x = 47 Add '9' to each side of the equation. -9 + 9 + 18x = 47 + 9 Combine like terms: -9 + 9 = 0 0 + 18x = 47 + 9 18x = 47 + 9 Combine like terms: 47 + 9 = 56 18x = 56 Divide each side by '18'. x = 3.111111111 Simplifying x = 3.111111111
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