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Simplifying 5r + 7 = 5r + -9 Reorder the terms: 7 + 5r = 5r + -9 Reorder the terms: 7 + 5r = -9 + 5r Add '-5r' to each side of the equation. 7 + 5r + -5r = -9 + 5r + -5r Combine like terms: 5r + -5r = 0 7 + 0 = -9 + 5r + -5r 7 = -9 + 5r + -5r Combine like terms: 5r + -5r = 0 7 = -9 + 0 7 = -9 Solving 7 = -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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