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Simplifying -2 + -8r = -9 + -9r Solving -2 + -8r = -9 + -9r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '9r' to each side of the equation. -2 + -8r + 9r = -9 + -9r + 9r Combine like terms: -8r + 9r = 1r -2 + 1r = -9 + -9r + 9r Combine like terms: -9r + 9r = 0 -2 + 1r = -9 + 0 -2 + 1r = -9 Add '2' to each side of the equation. -2 + 2 + 1r = -9 + 2 Combine like terms: -2 + 2 = 0 0 + 1r = -9 + 2 1r = -9 + 2 Combine like terms: -9 + 2 = -7 1r = -7 Divide each side by '1'. r = -7 Simplifying r = -7
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