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Simplifying 3 = -12 + 15r Solving 3 = -12 + 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. 3 + -15r = -12 + 15r + -15r Combine like terms: 15r + -15r = 0 3 + -15r = -12 + 0 3 + -15r = -12 Add '-3' to each side of the equation. 3 + -3 + -15r = -12 + -3 Combine like terms: 3 + -3 = 0 0 + -15r = -12 + -3 -15r = -12 + -3 Combine like terms: -12 + -3 = -15 -15r = -15 Divide each side by '-15'. r = 1 Simplifying r = 1
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