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Simplifying -7(x + -3) = -8x Reorder the terms: -7(-3 + x) = -8x (-3 * -7 + x * -7) = -8x (21 + -7x) = -8x Solving 21 + -7x = -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 + -7x + 8x = -8x + 8x Combine like terms: -7x + 8x = 1x 21 + 1x = -8x + 8x Combine like terms: -8x + 8x = 0 21 + 1x = 0 Add '-21' to each side of the equation. 21 + -21 + 1x = 0 + -21 Combine like terms: 21 + -21 = 0 0 + 1x = 0 + -21 1x = 0 + -21 Combine like terms: 0 + -21 = -21 1x = -21 Divide each side by '1'. x = -21 Simplifying x = -21
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