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Simplifying 8x + -9y + -7z = 18 Solving 8x + -9y + -7z = 18 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9y' to each side of the equation. 8x + -9y + 9y + -7z = 18 + 9y Combine like terms: -9y + 9y = 0 8x + 0 + -7z = 18 + 9y 8x + -7z = 18 + 9y Add '7z' to each side of the equation. 8x + -7z + 7z = 18 + 9y + 7z Combine like terms: -7z + 7z = 0 8x + 0 = 18 + 9y + 7z 8x = 18 + 9y + 7z Divide each side by '8'. x = 2.25 + 1.125y + 0.875z Simplifying x = 2.25 + 1.125y + 0.875z
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