Answer:
r = 15/4
Explanation:
Distrubute: 4/5r + (4/5)*5 = 7
Simplify: 4/5r + 4 = 7
Subtract: 4/5r = 3
Divide: r = 3 * 5/4
Simplify: r = 15/4
Result: r = 15/4
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