The tree has been planted for 9 - 4 = <<9-4=5>>5 years

It will take another 7 - 5 = <<7-5=2>>2 years for it to bear fruit

Lydia will be 9 + 2 = <<9+2=11>>11 years old

# Answer

11
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
It takes 7 years for an apple tree to bear fruit. If Lydia planted a tree when she was 4 years old and is now 9 years old, how old would she be when she gets to eat an apple from her tree for the first time?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
11
It takes 7 years for an apple tree to bear fruit. If Lydia planted a tree when she was 4 years old and is now 9 years old, how old would she be when she gets to eat an apple from her tree for the first time?
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