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Simplifying -5r + 15 = -5r + -1(-10) Reorder the terms: 15 + -5r = -5r + -1(-10) Multiply -1 * -10 15 + -5r = -5r + 10 Reorder the terms: 15 + -5r = 10 + -5r Add '5r' to each side of the equation. 15 + -5r + 5r = 10 + -5r + 5r Combine like terms: -5r + 5r = 0 15 + 0 = 10 + -5r + 5r 15 = 10 + -5r + 5r Combine like terms: -5r + 5r = 0 15 = 10 + 0 15 = 10 Solving 15 = 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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