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Simplifying 3x + -4y = 12 Solving 3x + -4y = 12 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. 3x + -4y + 4y = 12 + 4y Combine like terms: -4y + 4y = 0 3x + 0 = 12 + 4y 3x = 12 + 4y Divide each side by '3'. x = 4 + 1.333333333y Simplifying x = 4 + 1.333333333y

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