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Simplifying 8(5x + 7) = 21 Reorder the terms: 8(7 + 5x) = 21 (7 * 8 + 5x * 8) = 21 (56 + 40x) = 21 Solving 56 + 40x = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-56' to each side of the equation. 56 + -56 + 40x = 21 + -56 Combine like terms: 56 + -56 = 0 0 + 40x = 21 + -56 40x = 21 + -56 Combine like terms: 21 + -56 = -35 40x = -35 Divide each side by '40'. x = -0.875 Simplifying x = -0.875
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