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Simplifying 16 + 4r + -5r = 1 + -4r Combine like terms: 4r + -5r = -1r 16 + -1r = 1 + -4r Solving 16 + -1r = 1 + -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. 16 + -1r + 4r = 1 + -4r + 4r Combine like terms: -1r + 4r = 3r 16 + 3r = 1 + -4r + 4r Combine like terms: -4r + 4r = 0 16 + 3r = 1 + 0 16 + 3r = 1 Add '-16' to each side of the equation. 16 + -16 + 3r = 1 + -16 Combine like terms: 16 + -16 = 0 0 + 3r = 1 + -16 3r = 1 + -16 Combine like terms: 1 + -16 = -15 3r = -15 Divide each side by '3'. r = -5 Simplifying r = -5
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