Verified Answer :

0000000

1 3/10·b=39
(1·10+3)·b/10=39
13b/10=39
13b=39·10
13b=390|:13
b=30

Answer: 30

39= 13/10 b
39= 1.3 b ( 13 divided by 10= 1.3)
39/ 1.3= b (39 divided by 1.3)
30=b
Answer is 30

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