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Simplifying 16 + -2r = 2r + 4 Reorder the terms: 16 + -2r = 4 + 2r Solving 16 + -2r = 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. 16 + -2r + -2r = 4 + 2r + -2r Combine like terms: -2r + -2r = -4r 16 + -4r = 4 + 2r + -2r Combine like terms: 2r + -2r = 0 16 + -4r = 4 + 0 16 + -4r = 4 Add '-16' to each side of the equation. 16 + -16 + -4r = 4 + -16 Combine like terms: 16 + -16 = 0 0 + -4r = 4 + -16 -4r = 4 + -16 Combine like terms: 4 + -16 = -12 -4r = -12 Divide each side by '-4'. r = 3 Simplifying r = 3
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