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Simplifying 4x + -7y + z + 9 = 0 Reorder the terms: 9 + 4x + -7y + z = 0 Solving 9 + 4x + -7y + z = 0 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 + 4x + -7y + -9 + z = 0 + -9 Reorder the terms: 9 + -9 + 4x + -7y + z = 0 + -9 Combine like terms: 9 + -9 = 0 0 + 4x + -7y + z = 0 + -9 4x + -7y + z = 0 + -9 Combine like terms: 0 + -9 = -9 4x + -7y + z = -9 Add '7y' to each side of the equation. 4x + -7y + 7y + z = -9 + 7y Combine like terms: -7y + 7y = 0 4x + 0 + z = -9 + 7y 4x + z = -9 + 7y Add '-1z' to each side of the equation. 4x + z + -1z = -9 + 7y + -1z Combine like terms: z + -1z = 0 4x + 0 = -9 + 7y + -1z 4x = -9 + 7y + -1z Divide each side by '4'. x = -2.25 + 1.75y + -0.25z Simplifying x = -2.25 + 1.75y + -0.25z
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