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Simplifying 2r + 7 = (r + 4) Reorder the terms: 7 + 2r = (r + 4) Reorder the terms: 7 + 2r = (4 + r) Remove parenthesis around (4 + r) 7 + 2r = 4 + r Solving 7 + 2r = 4 + r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1r' to each side of the equation. 7 + 2r + -1r = 4 + r + -1r Combine like terms: 2r + -1r = 1r 7 + 1r = 4 + r + -1r Combine like terms: r + -1r = 0 7 + 1r = 4 + 0 7 + 1r = 4 Add '-7' to each side of the equation. 7 + -7 + 1r = 4 + -7 Combine like terms: 7 + -7 = 0 0 + 1r = 4 + -7 1r = 4 + -7 Combine like terms: 4 + -7 = -3 1r = -3 Divide each side by '1'. r = -3 Simplifying r = -3
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