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Simplifying 30x + 40y = 90 Solving 30x + 40y = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-40y' to each side of the equation. 30x + 40y + -40y = 90 + -40y Combine like terms: 40y + -40y = 0 30x + 0 = 90 + -40y 30x = 90 + -40y Divide each side by '30'. x = 3 + -1.333333333y Simplifying x = 3 + -1.333333333y
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