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Simplifying 3r + -1r + 4 = 4r + -2r Reorder the terms: 4 + 3r + -1r = 4r + -2r Combine like terms: 3r + -1r = 2r 4 + 2r = 4r + -2r Combine like terms: 4r + -2r = 2r 4 + 2r = 2r Add '-2r' to each side of the equation. 4 + 2r + -2r = 2r + -2r Combine like terms: 2r + -2r = 0 4 + 0 = 2r + -2r 4 = 2r + -2r Combine like terms: 2r + -2r = 0 4 = 0 Solving 4 = 0 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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