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Simplifying 2x + 2y + z = -9 Solving 2x + 2y + z = -9 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2y' to each side of the equation. 2x + 2y + -2y + z = -9 + -2y Combine like terms: 2y + -2y = 0 2x + 0 + z = -9 + -2y 2x + z = -9 + -2y Add '-1z' to each side of the equation. 2x + z + -1z = -9 + -2y + -1z Combine like terms: z + -1z = 0 2x + 0 = -9 + -2y + -1z 2x = -9 + -2y + -1z Divide each side by '2'. x = -4.5 + -1y + -0.5z Simplifying x = -4.5 + -1y + -0.5z
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