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Simplifying 7(r + -7) = -49 Reorder the terms: 7(-7 + r) = -49 (-7 * 7 + r * 7) = -49 (-49 + 7r) = -49 Add '49' to each side of the equation. -49 + 49 + 7r = -49 + 49 Combine like terms: -49 + 49 = 0 0 + 7r = -49 + 49 7r = -49 + 49 Combine like terms: -49 + 49 = 0 7r = 0 Solving 7r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Divide each side by '7'. r = 0 Simplifying r = 0
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