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Simplifying 144 = -4 + -2r Solving 144 = -4 + -2r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '2r' to each side of the equation. 144 + 2r = -4 + -2r + 2r Combine like terms: -2r + 2r = 0 144 + 2r = -4 + 0 144 + 2r = -4 Add '-144' to each side of the equation. 144 + -144 + 2r = -4 + -144 Combine like terms: 144 + -144 = 0 0 + 2r = -4 + -144 2r = -4 + -144 Combine like terms: -4 + -144 = -148 2r = -148 Divide each side by '2'. r = -74 Simplifying r = -74
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