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Simplifying 2x + 2y + 7z = -1 Solving 2x + 2y + 7z = -1 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 + 7z = -1 + -2y Combine like terms: 2y + -2y = 0 2x + 0 + 7z = -1 + -2y 2x + 7z = -1 + -2y Add '-7z' to each side of the equation. 2x + 7z + -7z = -1 + -2y + -7z Combine like terms: 7z + -7z = 0 2x + 0 = -1 + -2y + -7z 2x = -1 + -2y + -7z Divide each side by '2'. x = -0.5 + -1y + -3.5z Simplifying x = -0.5 + -1y + -3.5z
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