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Simplifying 20 = 2pir Solving 20 = 2ipr Solving for variable 'i'. Move all terms containing i to the left, all other terms to the right. Add '-2ipr' to each side of the equation. 20 + -2ipr = 2ipr + -2ipr Combine like terms: 2ipr + -2ipr = 0 20 + -2ipr = 0 Add '-20' to each side of the equation. 20 + -20 + -2ipr = 0 + -20 Combine like terms: 20 + -20 = 0 0 + -2ipr = 0 + -20 -2ipr = 0 + -20 Combine like terms: 0 + -20 = -20 -2ipr = -20 Divide each side by '-2pr'. i = 10p-1r-1 Simplifying i = 10p-1r-1
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