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Simplifying 20 = 0.8x + 0.85y Solving 20 = 0.8x + 0.85y Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8x' to each side of the equation. 20 + -0.8x = 0.8x + -0.8x + 0.85y Combine like terms: 0.8x + -0.8x = 0.0 20 + -0.8x = 0.0 + 0.85y 20 + -0.8x = 0.85y Add '-20' to each side of the equation. 20 + -20 + -0.8x = -20 + 0.85y Combine like terms: 20 + -20 = 0 0 + -0.8x = -20 + 0.85y -0.8x = -20 + 0.85y Divide each side by '-0.8'. x = 25 + -1.0625y Simplifying x = 25 + -1.0625y
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