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Simplifying 9r + 7 = r + -8 Reorder the terms: 7 + 9r = r + -8 Reorder the terms: 7 + 9r = -8 + r Solving 7 + 9r = -8 + r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1r' to each side of the equation. 7 + 9r + -1r = -8 + r + -1r Combine like terms: 9r + -1r = 8r 7 + 8r = -8 + r + -1r Combine like terms: r + -1r = 0 7 + 8r = -8 + 0 7 + 8r = -8 Add '-7' to each side of the equation. 7 + -7 + 8r = -8 + -7 Combine like terms: 7 + -7 = 0 0 + 8r = -8 + -7 8r = -8 + -7 Combine like terms: -8 + -7 = -15 8r = -15 Divide each side by '8'. r = -1.875 Simplifying r = -1.875
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