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Simplifying 5 + -7r = 8r Solving 5 + -7r = 8r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-8r' to each side of the equation. 5 + -7r + -8r = 8r + -8r Combine like terms: -7r + -8r = -15r 5 + -15r = 8r + -8r Combine like terms: 8r + -8r = 0 5 + -15r = 0 Add '-5' to each side of the equation. 5 + -5 + -15r = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -15r = 0 + -5 -15r = 0 + -5 Combine like terms: 0 + -5 = -5 -15r = -5 Divide each side by '-15'. r = 0.3333333333 Simplifying r = 0.3333333333
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