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Simplifying 8x + -21 = 2(x + -3) Reorder the terms: -21 + 8x = 2(x + -3) Reorder the terms: -21 + 8x = 2(-3 + x) -21 + 8x = (-3 * 2 + x * 2) -21 + 8x = (-6 + 2x) Solving -21 + 8x = -6 + 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 + 8x + -2x = -6 + 2x + -2x Combine like terms: 8x + -2x = 6x -21 + 6x = -6 + 2x + -2x Combine like terms: 2x + -2x = 0 -21 + 6x = -6 + 0 -21 + 6x = -6 Add '21' to each side of the equation. -21 + 21 + 6x = -6 + 21 Combine like terms: -21 + 21 = 0 0 + 6x = -6 + 21 6x = -6 + 21 Combine like terms: -6 + 21 = 15 6x = 15 Divide each side by '6'. x = 2.5 Simplifying x = 2.5
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