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Simplifying 420 * 50(0.02 + -1x) = 100x Multiply 420 * 50 21000(0.02 + -1x) = 100x (0.02 * 21000 + -1x * 21000) = 100x (420 + -21000x) = 100x Solving 420 + -21000x = 100x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-100x' to each side of the equation. 420 + -21000x + -100x = 100x + -100x Combine like terms: -21000x + -100x = -21100x 420 + -21100x = 100x + -100x Combine like terms: 100x + -100x = 0 420 + -21100x = 0 Add '-420' to each side of the equation. 420 + -420 + -21100x = 0 + -420 Combine like terms: 420 + -420 = 0 0 + -21100x = 0 + -420 -21100x = 0 + -420 Combine like terms: 0 + -420 = -420 -21100x = -420 Divide each side by '-21100'. x = 0.01990521327 Simplifying x = 0.01990521327
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