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Simplifying 8 = 4 + 2r Solving 8 = 4 + 2r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-2r' to each side of the equation. 8 + -2r = 4 + 2r + -2r Combine like terms: 2r + -2r = 0 8 + -2r = 4 + 0 8 + -2r = 4 Add '-8' to each side of the equation. 8 + -8 + -2r = 4 + -8 Combine like terms: 8 + -8 = 0 0 + -2r = 4 + -8 -2r = 4 + -8 Combine like terms: 4 + -8 = -4 -2r = -4 Divide each side by '-2'. r = 2 Simplifying r = 2
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