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Simplifying 7x + 9 = z Reorder the terms: 9 + 7x = z Solving 9 + 7x = z Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + 7x = -9 + z Combine like terms: 9 + -9 = 0 0 + 7x = -9 + z 7x = -9 + z Divide each side by '7'. x = -1.285714286 + 0.1428571429z Simplifying x = -1.285714286 + 0.1428571429z
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