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