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Simplifying 3x + -21 = 30 + -2x Reorder the terms: -21 + 3x = 30 + -2x Solving -21 + 3x = 30 + -2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2x' to each side of the equation. -21 + 3x + 2x = 30 + -2x + 2x Combine like terms: 3x + 2x = 5x -21 + 5x = 30 + -2x + 2x Combine like terms: -2x + 2x = 0 -21 + 5x = 30 + 0 -21 + 5x = 30 Add '21' to each side of the equation. -21 + 21 + 5x = 30 + 21 Combine like terms: -21 + 21 = 0 0 + 5x = 30 + 21 5x = 30 + 21 Combine like terms: 30 + 21 = 51 5x = 51 Divide each side by '5'. x = 10.2 Simplifying x = 10.2
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