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Simplifying -9r + 8 = -7(8 + 3r) + 12r Reorder the terms: 8 + -9r = -7(8 + 3r) + 12r 8 + -9r = (8 * -7 + 3r * -7) + 12r 8 + -9r = (-56 + -21r) + 12r Combine like terms: -21r + 12r = -9r 8 + -9r = -56 + -9r Add '9r' to each side of the equation. 8 + -9r + 9r = -56 + -9r + 9r Combine like terms: -9r + 9r = 0 8 + 0 = -56 + -9r + 9r 8 = -56 + -9r + 9r Combine like terms: -9r + 9r = 0 8 = -56 + 0 8 = -56 Solving 8 = -56 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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