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Simplifying -7(r + 55) = -56 Reorder the terms: -7(55 + r) = -56 (55 * -7 + r * -7) = -56 (-385 + -7r) = -56 Solving -385 + -7r = -56 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '385' to each side of the equation. -385 + 385 + -7r = -56 + 385 Combine like terms: -385 + 385 = 0 0 + -7r = -56 + 385 -7r = -56 + 385 Combine like terms: -56 + 385 = 329 -7r = 329 Divide each side by '-7'. r = -47 Simplifying r = -47
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