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Simplifying -2 = r + -1[-5] Multiply -1 * -5 -2 = r + 5 Reorder the terms: -2 = 5 + r Solving -2 = 5 + r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1r' to each side of the equation. -2 + -1r = 5 + r + -1r Combine like terms: r + -1r = 0 -2 + -1r = 5 + 0 -2 + -1r = 5 Add '2' to each side of the equation. -2 + 2 + -1r = 5 + 2 Combine like terms: -2 + 2 = 0 0 + -1r = 5 + 2 -1r = 5 + 2 Combine like terms: 5 + 2 = 7 -1r = 7 Divide each side by '-1'. r = -7 Simplifying r = -7
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