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Simplifying 4x + y + -1z = -7 Solving 4x + y + -1z = -7 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. 4x + y + -1y + -1z = -7 + -1y Combine like terms: y + -1y = 0 4x + 0 + -1z = -7 + -1y 4x + -1z = -7 + -1y Add 'z' to each side of the equation. 4x + -1z + z = -7 + -1y + z Combine like terms: -1z + z = 0 4x + 0 = -7 + -1y + z 4x = -7 + -1y + z Divide each side by '4'. x = -1.75 + -0.25y + 0.25z Simplifying x = -1.75 + -0.25y + 0.25z
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