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Simplifying -4 + 8r = 86 + -10r Solving -4 + 8r = 86 + -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. -4 + 8r + 10r = 86 + -10r + 10r Combine like terms: 8r + 10r = 18r -4 + 18r = 86 + -10r + 10r Combine like terms: -10r + 10r = 0 -4 + 18r = 86 + 0 -4 + 18r = 86 Add '4' to each side of the equation. -4 + 4 + 18r = 86 + 4 Combine like terms: -4 + 4 = 0 0 + 18r = 86 + 4 18r = 86 + 4 Combine like terms: 86 + 4 = 90 18r = 90 Divide each side by '18'. r = 5 Simplifying r = 5
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