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Simplifying 10(r + -2) = -5r Reorder the terms: 10(-2 + r) = -5r (-2 * 10 + r * 10) = -5r (-20 + 10r) = -5r Solving -20 + 10r = -5r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '5r' to each side of the equation. -20 + 10r + 5r = -5r + 5r Combine like terms: 10r + 5r = 15r -20 + 15r = -5r + 5r Combine like terms: -5r + 5r = 0 -20 + 15r = 0 Add '20' to each side of the equation. -20 + 20 + 15r = 0 + 20 Combine like terms: -20 + 20 = 0 0 + 15r = 0 + 20 15r = 0 + 20 Combine like terms: 0 + 20 = 20 15r = 20 Divide each side by '15'. r = 1.333333333 Simplifying r = 1.333333333
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