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Simplifying 9x + 4y + 7z = 7 Solving 9x + 4y + 7z = 7 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4y' to each side of the equation. 9x + 4y + -4y + 7z = 7 + -4y Combine like terms: 4y + -4y = 0 9x + 0 + 7z = 7 + -4y 9x + 7z = 7 + -4y Add '-7z' to each side of the equation. 9x + 7z + -7z = 7 + -4y + -7z Combine like terms: 7z + -7z = 0 9x + 0 = 7 + -4y + -7z 9x = 7 + -4y + -7z Divide each side by '9'. x = 0.7777777778 + -0.4444444444y + -0.7777777778z Simplifying x = 0.7777777778 + -0.4444444444y + -0.7777777778z
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