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Simplifying 4r + 7 + -1r = 3(5 + r) Reorder the terms: 7 + 4r + -1r = 3(5 + r) Combine like terms: 4r + -1r = 3r 7 + 3r = 3(5 + r) 7 + 3r = (5 * 3 + r * 3) 7 + 3r = (15 + 3r) Add '-3r' to each side of the equation. 7 + 3r + -3r = 15 + 3r + -3r Combine like terms: 3r + -3r = 0 7 + 0 = 15 + 3r + -3r 7 = 15 + 3r + -3r Combine like terms: 3r + -3r = 0 7 = 15 + 0 7 = 15 Solving 7 = 15 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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