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Simplifying 126 = -42r Solving 126 = -42r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '42r' to each side of the equation. 126 + 42r = -42r + 42r Combine like terms: -42r + 42r = 0 126 + 42r = 0 Add '-126' to each side of the equation. 126 + -126 + 42r = 0 + -126 Combine like terms: 126 + -126 = 0 0 + 42r = 0 + -126 42r = 0 + -126 Combine like terms: 0 + -126 = -126 42r = -126 Divide each side by '42'. r = -3 Simplifying r = -3
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