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Simplifying 7 * 3 * 8(1 + -1x) = 126 Multiply 7 * 3 21 * 8(1 + -1x) = 126 Multiply 21 * 8 168(1 + -1x) = 126 (1 * 168 + -1x * 168) = 126 (168 + -168x) = 126 Solving 168 + -168x = 126 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-168' to each side of the equation. 168 + -168 + -168x = 126 + -168 Combine like terms: 168 + -168 = 0 0 + -168x = 126 + -168 -168x = 126 + -168 Combine like terms: 126 + -168 = -42 -168x = -42 Divide each side by '-168'. x = 0.25 Simplifying x = 0.25
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