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Simplifying 4x + 9y + 5z = 13 Solving 4x + 9y + 5z = 13 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9y' to each side of the equation. 4x + 9y + -9y + 5z = 13 + -9y Combine like terms: 9y + -9y = 0 4x + 0 + 5z = 13 + -9y 4x + 5z = 13 + -9y Add '-5z' to each side of the equation. 4x + 5z + -5z = 13 + -9y + -5z Combine like terms: 5z + -5z = 0 4x + 0 = 13 + -9y + -5z 4x = 13 + -9y + -5z Divide each side by '4'. x = 3.25 + -2.25y + -1.25z Simplifying x = 3.25 + -2.25y + -1.25z
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