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Simplifying 30y + 90x + z = 40 Reorder the terms: 90x + 30y + z = 40 Solving 90x + 30y + z = 40 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-30y' to each side of the equation. 90x + 30y + -30y + z = 40 + -30y Combine like terms: 30y + -30y = 0 90x + 0 + z = 40 + -30y 90x + z = 40 + -30y Add '-1z' to each side of the equation. 90x + z + -1z = 40 + -30y + -1z Combine like terms: z + -1z = 0 90x + 0 = 40 + -30y + -1z 90x = 40 + -30y + -1z Divide each side by '90'. x = 0.4444444444 + -0.3333333333y + -0.01111111111z Simplifying x = 0.4444444444 + -0.3333333333y + -0.01111111111z
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