12+21=33=11X（1+2） 23+32=55=11x(2+3) 59+95=154=11x(5+9） Write a similar equation for two digits with ten digits A and one digit B?

ab+ba=11X（a+b）

Fill in 48, 39, 29, 21, (), ()

11,4

Fill in 1,3,6, (), (), 21

Find the rule and fill in 1,3,6, (10), (15), 21
3=1+2
6=3+3
10=6+4
15=10+5
21=15+6

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