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x = 12
13
Cross multiply: x * 3 = 1 * 12 Simplifying x * 3 = 1 * 12 Reorder the terms for easier multiplication: 3x = 1 * 12 Multiply 1 * 12 3x = 12 Solving 3x = 12 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Divide each side by '3'. x = 4 Simplifying x = 4
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