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Simplifying -9r + -2 = -10r Reorder the terms: -2 + -9r = -10r Solving -2 + -9r = -10r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '10r' to each side of the equation. -2 + -9r + 10r = -10r + 10r Combine like terms: -9r + 10r = 1r -2 + 1r = -10r + 10r Combine like terms: -10r + 10r = 0 -2 + 1r = 0 Add '2' to each side of the equation. -2 + 2 + 1r = 0 + 2 Combine like terms: -2 + 2 = 0 0 + 1r = 0 + 2 1r = 0 + 2 Combine like terms: 0 + 2 = 2 1r = 2 Divide each side by '1'. r = 2 Simplifying r = 2
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