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Simplifying 10 = -15r Solving 10 = -15r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '15r' to each side of the equation. 10 + 15r = -15r + 15r Combine like terms: -15r + 15r = 0 10 + 15r = 0 Add '-10' to each side of the equation. 10 + -10 + 15r = 0 + -10 Combine like terms: 10 + -10 = 0 0 + 15r = 0 + -10 15r = 0 + -10 Combine like terms: 0 + -10 = -10 15r = -10 Divide each side by '15'. r = -0.6666666667 Simplifying r = -0.6666666667
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