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Simplifying -5(r + 3) = 3r + 7 + -8r Reorder the terms: -5(3 + r) = 3r + 7 + -8r (3 * -5 + r * -5) = 3r + 7 + -8r (-15 + -5r) = 3r + 7 + -8r Reorder the terms: -15 + -5r = 7 + 3r + -8r Combine like terms: 3r + -8r = -5r -15 + -5r = 7 + -5r Add '5r' to each side of the equation. -15 + -5r + 5r = 7 + -5r + 5r Combine like terms: -5r + 5r = 0 -15 + 0 = 7 + -5r + 5r -15 = 7 + -5r + 5r Combine like terms: -5r + 5r = 0 -15 = 7 + 0 -15 = 7 Solving -15 = 7 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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