Giri and Sona both collect stamps. Sona has p stamps. Giri has 10 more than twice the number of stamps that Sona has. Together they have 400 stamps. Which of these equations can be used to find p, the number of stamps that Sona has?

 

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give explaination of the option u choose
 
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p + [2p + 10] =400
3p + 10 = 400
option c​​​​​​​
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