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Simplifying 2x + 3(x + -2) = 3x + -21 + 3x Reorder the terms: 2x + 3(-2 + x) = 3x + -21 + 3x 2x + (-2 * 3 + x * 3) = 3x + -21 + 3x 2x + (-6 + 3x) = 3x + -21 + 3x Reorder the terms: -6 + 2x + 3x = 3x + -21 + 3x Combine like terms: 2x + 3x = 5x -6 + 5x = 3x + -21 + 3x Reorder the terms: -6 + 5x = -21 + 3x + 3x Combine like terms: 3x + 3x = 6x -6 + 5x = -21 + 6x Solving -6 + 5x = -21 + 6x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6x' to each side of the equation. -6 + 5x + -6x = -21 + 6x + -6x Combine like terms: 5x + -6x = -1x -6 + -1x = -21 + 6x + -6x Combine like terms: 6x + -6x = 0 -6 + -1x = -21 + 0 -6 + -1x = -21 Add '6' to each side of the equation. -6 + 6 + -1x = -21 + 6 Combine like terms: -6 + 6 = 0 0 + -1x = -21 + 6 -1x = -21 + 6 Combine like terms: -21 + 6 = -15 -1x = -15 Divide each side by '-1'. x = 15 Simplifying x = 15
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