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Simplifying 65 = 57 + -4r Solving 65 = 57 + -4r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '4r' to each side of the equation. 65 + 4r = 57 + -4r + 4r Combine like terms: -4r + 4r = 0 65 + 4r = 57 + 0 65 + 4r = 57 Add '-65' to each side of the equation. 65 + -65 + 4r = 57 + -65 Combine like terms: 65 + -65 = 0 0 + 4r = 57 + -65 4r = 57 + -65 Combine like terms: 57 + -65 = -8 4r = -8 Divide each side by '4'. r = -2 Simplifying r = -2
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