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Simplifying -7(r + 10) = -49 Reorder the terms: -7(10 + r) = -49 (10 * -7 + r * -7) = -49 (-70 + -7r) = -49 Solving -70 + -7r = -49 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '70' to each side of the equation. -70 + 70 + -7r = -49 + 70 Combine like terms: -70 + 70 = 0 0 + -7r = -49 + 70 -7r = -49 + 70 Combine like terms: -49 + 70 = 21 -7r = 21 Divide each side by '-7'. r = -3 Simplifying r = -3
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