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Simplifying 7x + 9y + -4z = 1 Solving 7x + 9y + -4z = 1 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. 7x + 9y + -9y + -4z = 1 + -9y Combine like terms: 9y + -9y = 0 7x + 0 + -4z = 1 + -9y 7x + -4z = 1 + -9y Add '4z' to each side of the equation. 7x + -4z + 4z = 1 + -9y + 4z Combine like terms: -4z + 4z = 0 7x + 0 = 1 + -9y + 4z 7x = 1 + -9y + 4z Divide each side by '7'. x = 0.1428571429 + -1.285714286y + 0.5714285714z Simplifying x = 0.1428571429 + -1.285714286y + 0.5714285714z
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