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Simplifying 2r + -7 + -8r = -23 Reorder the terms: -7 + 2r + -8r = -23 Combine like terms: 2r + -8r = -6r -7 + -6r = -23 Solving -7 + -6r = -23 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -6r = -23 + 7 Combine like terms: -7 + 7 = 0 0 + -6r = -23 + 7 -6r = -23 + 7 Combine like terms: -23 + 7 = -16 -6r = -16 Divide each side by '-6'. r = 2.666666667 Simplifying r = 2.666666667
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