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Simplifying 2 = 2(r2 + rh) Reorder the terms: 2 = 2(hr + r2) 2 = (hr * 2 + r2 * 2) 2 = (2hr + 2r2) Solving 2 = 2hr + 2r2 Solving for variable 'h'. Move all terms containing h to the left, all other terms to the right. Add '-2hr' to each side of the equation. 2 + -2hr = 2hr + -2hr + 2r2 Combine like terms: 2hr + -2hr = 0 2 + -2hr = 0 + 2r2 2 + -2hr = 2r2 Add '-2' to each side of the equation. 2 + -2 + -2hr = -2 + 2r2 Combine like terms: 2 + -2 = 0 0 + -2hr = -2 + 2r2 -2hr = -2 + 2r2 Divide each side by '-2r'. h = r-1 + -1r Simplifying h = r-1 + -1r
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