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Simplifying 7 + 3(-1r + -2) = 9 + -3r Reorder the terms: 7 + 3(-2 + -1r) = 9 + -3r 7 + (-2 * 3 + -1r * 3) = 9 + -3r 7 + (-6 + -3r) = 9 + -3r Combine like terms: 7 + -6 = 1 1 + -3r = 9 + -3r Add '3r' to each side of the equation. 1 + -3r + 3r = 9 + -3r + 3r Combine like terms: -3r + 3r = 0 1 + 0 = 9 + -3r + 3r 1 = 9 + -3r + 3r Combine like terms: -3r + 3r = 0 1 = 9 + 0 1 = 9 Solving 1 = 9 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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