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Simplifying 3(r + 5) = 3r + 9 Reorder the terms: 3(5 + r) = 3r + 9 (5 * 3 + r * 3) = 3r + 9 (15 + 3r) = 3r + 9 Reorder the terms: 15 + 3r = 9 + 3r Add '-3r' to each side of the equation. 15 + 3r + -3r = 9 + 3r + -3r Combine like terms: 3r + -3r = 0 15 + 0 = 9 + 3r + -3r 15 = 9 + 3r + -3r Combine like terms: 3r + -3r = 0 15 = 9 + 0 15 = 9 Solving 15 = 9 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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