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Simplifying -21 + 6x = -3(-2x + 5) + 2x Reorder the terms: -21 + 6x = -3(5 + -2x) + 2x -21 + 6x = (5 * -3 + -2x * -3) + 2x -21 + 6x = (-15 + 6x) + 2x Combine like terms: 6x + 2x = 8x -21 + 6x = -15 + 8x Solving -21 + 6x = -15 + 8x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8x' to each side of the equation. -21 + 6x + -8x = -15 + 8x + -8x Combine like terms: 6x + -8x = -2x -21 + -2x = -15 + 8x + -8x Combine like terms: 8x + -8x = 0 -21 + -2x = -15 + 0 -21 + -2x = -15 Add '21' to each side of the equation. -21 + 21 + -2x = -15 + 21 Combine like terms: -21 + 21 = 0 0 + -2x = -15 + 21 -2x = -15 + 21 Combine like terms: -15 + 21 = 6 -2x = 6 Divide each side by '-2'. x = -3 Simplifying x = -3
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