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Simplifying -1(1 + 7x) = -8x + 3 (1 * -1 + 7x * -1) = -8x + 3 (-1 + -7x) = -8x + 3 Reorder the terms: -1 + -7x = 3 + -8x Solving -1 + -7x = 3 + -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. -1 + -7x + 8x = 3 + -8x + 8x Combine like terms: -7x + 8x = 1x -1 + 1x = 3 + -8x + 8x Combine like terms: -8x + 8x = 0 -1 + 1x = 3 + 0 -1 + 1x = 3 Add '1' to each side of the equation. -1 + 1 + 1x = 3 + 1 Combine like terms: -1 + 1 = 0 0 + 1x = 3 + 1 1x = 3 + 1 Combine like terms: 3 + 1 = 4 1x = 4 Divide each side by '1'. x = 4 Simplifying x = 4
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