Carlo has a music recital next week. He practiced twice as long on Monday as on Tuesday. On Tuesday, he practiced 10 minutes less than on Wednesday. On Wednesday, he practiced 5 minutes more than on Thursday. On Thursday, he practiced for 50 minutes. If he needs to practice for a total of 5 hours that week, how long should Carlo practice on Friday?
On Wednesday, Carlo practiced for 50 + 5 = 
<gadget id="calculator">50+5</gadget>
<output>55</output>
55 minutes.
On Tuesday, he practiced for 55 - 10 = 
<gadget id="calculator">55-10</gadget>
<output>45</output>
45 minutes.
On Monday, he practiced for 45 x 2 = 
<gadget id="calculator">45*2</gadget>
<output>90</output>
90 minutes.
So, Carlo practiced for a total of 90 + 45 + 55 + 50 = 
<gadget id="calculator">90+45+55+50</gadget>
<output>240</output>
240 minutes from Monday to Thursday.
He needs to practice for a total of 60 x 5 = 
<gadget id="calculator">60*5</gadget>
<output>300</output>
300 minutes.
Therefore, he should practice for 300 - 240 = 
<gadget id="calculator">300-240</gadget>
<output>60</output>
60 minutes on Friday.

<result>60</result>