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Simplifying (1 + r) = 3.1 Remove parenthesis around (1 + r) 1 + r = 3.1 Solving 1 + r = 3.1 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + r = 3.1 + -1 Combine like terms: 1 + -1 = 0 0 + r = 3.1 + -1 r = 3.1 + -1 Combine like terms: 3.1 + -1 = 2.1 r = 2.1 Simplifying r = 2.1
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