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Simplifying x + y + 4z = -31 Solving x + y + 4z = -31 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1y' to each side of the equation. x + y + -1y + 4z = -31 + -1y Combine like terms: y + -1y = 0 x + 0 + 4z = -31 + -1y x + 4z = -31 + -1y Add '-4z' to each side of the equation. x + 4z + -4z = -31 + -1y + -4z Combine like terms: 4z + -4z = 0 x + 0 = -31 + -1y + -4z x = -31 + -1y + -4z Simplifying x = -31 + -1y + -4z
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