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Simplifying -72 = -2 + -10r Solving -72 = -2 + -10r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '10r' to each side of the equation. -72 + 10r = -2 + -10r + 10r Combine like terms: -10r + 10r = 0 -72 + 10r = -2 + 0 -72 + 10r = -2 Add '72' to each side of the equation. -72 + 72 + 10r = -2 + 72 Combine like terms: -72 + 72 = 0 0 + 10r = -2 + 72 10r = -2 + 72 Combine like terms: -2 + 72 = 70 10r = 70 Divide each side by '10'. r = 7 Simplifying r = 7
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