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Simplifying -39x + 21 = 64 + 84x Reorder the terms: 21 + -39x = 64 + 84x Solving 21 + -39x = 64 + 84x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-84x' to each side of the equation. 21 + -39x + -84x = 64 + 84x + -84x Combine like terms: -39x + -84x = -123x 21 + -123x = 64 + 84x + -84x Combine like terms: 84x + -84x = 0 21 + -123x = 64 + 0 21 + -123x = 64 Add '-21' to each side of the equation. 21 + -21 + -123x = 64 + -21 Combine like terms: 21 + -21 = 0 0 + -123x = 64 + -21 -123x = 64 + -21 Combine like terms: 64 + -21 = 43 -123x = 43 Divide each side by '-123'. x = -0.3495934959 Simplifying x = -0.3495934959
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