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Simplifying 2r + -1(5 + -1r) = 13 + 3r 2r + (5 * -1 + -1r * -1) = 13 + 3r 2r + (-5 + 1r) = 13 + 3r Reorder the terms: -5 + 2r + 1r = 13 + 3r Combine like terms: 2r + 1r = 3r -5 + 3r = 13 + 3r Add '-3r' to each side of the equation. -5 + 3r + -3r = 13 + 3r + -3r Combine like terms: 3r + -3r = 0 -5 + 0 = 13 + 3r + -3r -5 = 13 + 3r + -3r Combine like terms: 3r + -3r = 0 -5 = 13 + 0 -5 = 13 Solving -5 = 13 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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