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Simplifying 2x + 4y + 5z = 20 Solving 2x + 4y + 5z = 20 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4y' to each side of the equation. 2x + 4y + -4y + 5z = 20 + -4y Combine like terms: 4y + -4y = 0 2x + 0 + 5z = 20 + -4y 2x + 5z = 20 + -4y Add '-5z' to each side of the equation. 2x + 5z + -5z = 20 + -4y + -5z Combine like terms: 5z + -5z = 0 2x + 0 = 20 + -4y + -5z 2x = 20 + -4y + -5z Divide each side by '2'. x = 10 + -2y + -2.5z Simplifying x = 10 + -2y + -2.5z
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