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Simplifying 3 + 3r = 2(2r + 4) Reorder the terms: 3 + 3r = 2(4 + 2r) 3 + 3r = (4 * 2 + 2r * 2) 3 + 3r = (8 + 4r) Solving 3 + 3r = 8 + 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. 3 + 3r + -4r = 8 + 4r + -4r Combine like terms: 3r + -4r = -1r 3 + -1r = 8 + 4r + -4r Combine like terms: 4r + -4r = 0 3 + -1r = 8 + 0 3 + -1r = 8 Add '-3' to each side of the equation. 3 + -3 + -1r = 8 + -3 Combine like terms: 3 + -3 = 0 0 + -1r = 8 + -3 -1r = 8 + -3 Combine like terms: 8 + -3 = 5 -1r = 5 Divide each side by '-1'. r = -5 Simplifying r = -5
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