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Simplifying 0.2x * 0.4x = 18 Reorder the terms for easier multiplication: 0.2 * 0.4x * x = 18 Multiply 0.2 * 0.4 0.08x * x = 18 Multiply x * x 0.08x2 = 18 Solving 0.08x2 = 18 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Divide each side by '0.08'. x2 = 225 Simplifying x2 = 225 Take the square root of each side: x = {-15, 15}
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