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Simplifying 7 + 2 = 5(r + -4) Combine like terms: 7 + 2 = 9 9 = 5(r + -4) Reorder the terms: 9 = 5(-4 + r) 9 = (-4 * 5 + r * 5) 9 = (-20 + 5r) Solving 9 = -20 + 5r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-5r' to each side of the equation. 9 + -5r = -20 + 5r + -5r Combine like terms: 5r + -5r = 0 9 + -5r = -20 + 0 9 + -5r = -20 Add '-9' to each side of the equation. 9 + -9 + -5r = -20 + -9 Combine like terms: 9 + -9 = 0 0 + -5r = -20 + -9 -5r = -20 + -9 Combine like terms: -20 + -9 = -29 -5r = -29 Divide each side by '-5'. r = 5.8 Simplifying r = 5.8
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