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Simplifying 8 + -4r = 1 + -5r Solving 8 + -4r = 1 + -5r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '5r' to each side of the equation. 8 + -4r + 5r = 1 + -5r + 5r Combine like terms: -4r + 5r = 1r 8 + 1r = 1 + -5r + 5r Combine like terms: -5r + 5r = 0 8 + 1r = 1 + 0 8 + 1r = 1 Add '-8' to each side of the equation. 8 + -8 + 1r = 1 + -8 Combine like terms: 8 + -8 = 0 0 + 1r = 1 + -8 1r = 1 + -8 Combine like terms: 1 + -8 = -7 1r = -7 Divide each side by '1'. r = -7 Simplifying r = -7
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