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Simplifying -1r + 7 = 56 Reorder the terms: 7 + -1r = 56 Solving 7 + -1r = 56 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1r = 56 + -7 Combine like terms: 7 + -7 = 0 0 + -1r = 56 + -7 -1r = 56 + -7 Combine like terms: 56 + -7 = 49 -1r = 49 Divide each side by '-1'. r = -49 Simplifying r = -49
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