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Simplifying 7 + -2r = 3r + -5(r + -2) Reorder the terms: 7 + -2r = 3r + -5(-2 + r) 7 + -2r = 3r + (-2 * -5 + r * -5) 7 + -2r = 3r + (10 + -5r) Reorder the terms: 7 + -2r = 10 + 3r + -5r Combine like terms: 3r + -5r = -2r 7 + -2r = 10 + -2r Add '2r' to each side of the equation. 7 + -2r + 2r = 10 + -2r + 2r Combine like terms: -2r + 2r = 0 7 + 0 = 10 + -2r + 2r 7 = 10 + -2r + 2r Combine like terms: -2r + 2r = 0 7 = 10 + 0 7 = 10 Solving 7 = 10 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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