Trevor and marissa together have 26 t-shirts to sell. If marissa has 6 fewer t-shirts than Trevor, find how many T-shirts trevor has

Trevor has 16 T-shirts

Step-by-step explanation:

Trevor's shirts (t) + Marisa's shirts (m) = 26

t + m = 26

m = t - 6

Replace Marisa's (m) by t-6 (6 fewer than Trevor)

t + t - 6 = 26

2t - 6 = 26

2t = 26+6

t = 32/2

t = 16

Trevor has 16 t-shirts

Marisa has 16 - 6 t-shirts = 10

16 + 10 = 26