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Simplifying 21x + -6 = 6 + -9x Reorder the terms: -6 + 21x = 6 + -9x Solving -6 + 21x = 6 + -9x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9x' to each side of the equation. -6 + 21x + 9x = 6 + -9x + 9x Combine like terms: 21x + 9x = 30x -6 + 30x = 6 + -9x + 9x Combine like terms: -9x + 9x = 0 -6 + 30x = 6 + 0 -6 + 30x = 6 Add '6' to each side of the equation. -6 + 6 + 30x = 6 + 6 Combine like terms: -6 + 6 = 0 0 + 30x = 6 + 6 30x = 6 + 6 Combine like terms: 6 + 6 = 12 30x = 12 Divide each side by '30'. x = 0.4 Simplifying x = 0.4
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