Andy blew up 50 balloons – the 12 balloons Ashley blew up = <<50-12=38>>38 balloons.

We know how long it took Andy to blow up 2 balloons, so 38 balloons / 2 = <<38/2=19>>19 time increments.

We know the time increment is 5 minutes, so 19 x 5 minutes = <<19*5=95>>95 minutes.

# Answer

95
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Ashley had already blown up 12 balloons for the party when Andy took over and started blowing them up at a rate of 2 every five minutes. When Andy stopped, there were 50 balloons. For how many minutes did Andy blow up balloons?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
95
Ashley had already blown up 12 balloons for the party when Andy took over and started blowing them up at a rate of 2 every five minutes. When Andy stopped, there were 50 balloons. For how many minutes did Andy blow up balloons?
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