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Simplifying -2 = 5r + 3r Combine like terms: 5r + 3r = 8r -2 = 8r Solving -2 = 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. -2 + -8r = 8r + -8r Combine like terms: 8r + -8r = 0 -2 + -8r = 0 Add '2' to each side of the equation. -2 + 2 + -8r = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -8r = 0 + 2 -8r = 0 + 2 Combine like terms: 0 + 2 = 2 -8r = 2 Divide each side by '-8'. r = -0.25 Simplifying r = -0.25
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