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Simplifying 3r + -10 = r + 2(r + 10) Reorder the terms: -10 + 3r = r + 2(r + 10) Reorder the terms: -10 + 3r = r + 2(10 + r) -10 + 3r = r + (10 * 2 + r * 2) -10 + 3r = r + (20 + 2r) Reorder the terms: -10 + 3r = 20 + r + 2r Combine like terms: r + 2r = 3r -10 + 3r = 20 + 3r Add '-3r' to each side of the equation. -10 + 3r + -3r = 20 + 3r + -3r Combine like terms: 3r + -3r = 0 -10 + 0 = 20 + 3r + -3r -10 = 20 + 3r + -3r Combine like terms: 3r + -3r = 0 -10 = 20 + 0 -10 = 20 Solving -10 = 20 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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