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