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Simplifying 72 = 72x2 Solving 72 = 72x2 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-72x2' to each side of the equation. 72 + -72x2 = 72x2 + -72x2 Combine like terms: 72x2 + -72x2 = 0 72 + -72x2 = 0 Add '-72' to each side of the equation. 72 + -72 + -72x2 = 0 + -72 Combine like terms: 72 + -72 = 0 0 + -72x2 = 0 + -72 -72x2 = 0 + -72 Combine like terms: 0 + -72 = -72 -72x2 = -72 Divide each side by '-72'. x2 = 1 Simplifying x2 = 1 Take the square root of each side: x = {-1, 1}
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