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Simplifying -640(x + 5) = 1040 Reorder the terms: -640(5 + x) = 1040 (5 * -640 + x * -640) = 1040 (-3200 + -640x) = 1040 Solving -3200 + -640x = 1040 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3200' to each side of the equation. -3200 + 3200 + -640x = 1040 + 3200 Combine like terms: -3200 + 3200 = 0 0 + -640x = 1040 + 3200 -640x = 1040 + 3200 Combine like terms: 1040 + 3200 = 4240 -640x = 4240 Divide each side by '-640'. x = -6.625 Simplifying x = -6.625
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