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Simplifying 252 = -1r + 5(6r + 4) Reorder the terms: 252 = -1r + 5(4 + 6r) 252 = -1r + (4 * 5 + 6r * 5) 252 = -1r + (20 + 30r) Reorder the terms: 252 = 20 + -1r + 30r Combine like terms: -1r + 30r = 29r 252 = 20 + 29r Solving 252 = 20 + 29r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-29r' to each side of the equation. 252 + -29r = 20 + 29r + -29r Combine like terms: 29r + -29r = 0 252 + -29r = 20 + 0 252 + -29r = 20 Add '-252' to each side of the equation. 252 + -252 + -29r = 20 + -252 Combine like terms: 252 + -252 = 0 0 + -29r = 20 + -252 -29r = 20 + -252 Combine like terms: 20 + -252 = -232 -29r = -232 Divide each side by '-29'. r = 8 Simplifying r = 8
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