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Simplifying 5 + -8r + 1 + 3 = -7r + 2 Reorder the terms: 5 + 1 + 3 + -8r = -7r + 2 Combine like terms: 5 + 1 = 6 6 + 3 + -8r = -7r + 2 Combine like terms: 6 + 3 = 9 9 + -8r = -7r + 2 Reorder the terms: 9 + -8r = 2 + -7r Solving 9 + -8r = 2 + -7r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '7r' to each side of the equation. 9 + -8r + 7r = 2 + -7r + 7r Combine like terms: -8r + 7r = -1r 9 + -1r = 2 + -7r + 7r Combine like terms: -7r + 7r = 0 9 + -1r = 2 + 0 9 + -1r = 2 Add '-9' to each side of the equation. 9 + -9 + -1r = 2 + -9 Combine like terms: 9 + -9 = 0 0 + -1r = 2 + -9 -1r = 2 + -9 Combine like terms: 2 + -9 = -7 -1r = -7 Divide each side by '-1'. r = 7 Simplifying r = 7
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