A*(4+(B/100))=108.81

find the value of (A+B) by solving the above equation

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4A + AB / 100 = 10881/100

4A + (AB/100) = 108 + (81/100)

So,

4A = 108 and AB/100 = 81/100 => AB = 81

Hence

A=108/4=27 and by solving AB 81, B = 3

Thus A+B = 30

**This solution is courtesy Shashikant Soni**