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Simplifying 25 + 3r = 2(r + 2) + -2r Reorder the terms: 25 + 3r = 2(2 + r) + -2r 25 + 3r = (2 * 2 + r * 2) + -2r 25 + 3r = (4 + 2r) + -2r Combine like terms: 2r + -2r = 0 25 + 3r = 4 + 0 25 + 3r = 4 Solving 25 + 3r = 4 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-25' to each side of the equation. 25 + -25 + 3r = 4 + -25 Combine like terms: 25 + -25 = 0 0 + 3r = 4 + -25 3r = 4 + -25 Combine like terms: 4 + -25 = -21 3r = -21 Divide each side by '3'. r = -7 Simplifying r = -7
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