Trevor and marissa together have 26 t shirt to sell if marissa has 6 fewer t shirts than trevor find how many t-shirts trevor has

1) Set up an equation for the total, with T representing Trevor and M representing Marissa: 

T + M = 26

2) Use the provided information related Marissa's t-shirts to Trevor's to solve for one variable at a time (in this case, T): 

M = T-6 

3) Substitute M with this equation into the initial, first equation: 

T + (T-6)  = 26

4) Combine like terms and isolate T: 

T+T = 26 + 6

2T = 32 

T = 16 

5) Therefore, you now know that Trevor has 16 t-shirts. To find the number of t-shirts that Marissa has, simply plug in this amount for T into the equation that was already set up for M: 

M = T - 6 

M = 16 - 6 

M = 10

Therefore, Trevor has 16 t-shirts and Marissa has 10 t-shirts.

Hope this helps, and don't forget to mark my answer as the Brainliest! :)