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Simplifying 0.80x + 20 = 0.60x + 21 Reorder the terms: 20 + 0.80x = 0.60x + 21 Reorder the terms: 20 + 0.80x = 21 + 0.60x Solving 20 + 0.80x = 21 + 0.60x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.60x' to each side of the equation. 20 + 0.80x + -0.60x = 21 + 0.60x + -0.60x Combine like terms: 0.80x + -0.60x = 0.2x 20 + 0.2x = 21 + 0.60x + -0.60x Combine like terms: 0.60x + -0.60x = 0.00 20 + 0.2x = 21 + 0.00 20 + 0.2x = 21 Add '-20' to each side of the equation. 20 + -20 + 0.2x = 21 + -20 Combine like terms: 20 + -20 = 0 0 + 0.2x = 21 + -20 0.2x = 21 + -20 Combine like terms: 21 + -20 = 1 0.2x = 1 Divide each side by '0.2'. x = 5 Simplifying x = 5
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