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Simplifying 7r + -1(-16) = 100 Multiply -1 * -16 7r + 16 = 100 Reorder the terms: 16 + 7r = 100 Solving 16 + 7r = 100 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-16' to each side of the equation. 16 + -16 + 7r = 100 + -16 Combine like terms: 16 + -16 = 0 0 + 7r = 100 + -16 7r = 100 + -16 Combine like terms: 100 + -16 = 84 7r = 84 Divide each side by '7'. r = 12 Simplifying r = 12
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