The number 6 could replace the gap :)
Answer:
C) 48 T-shirts
Step-by-step explanation:
The equation to find the amount of t-shirts is:
1/3x + x = 64
Add the Xs:
4/3x = 64
Multiply both sids by 3/4
Now:
x = 48 t shirts
To check:
64 - 48 = 16
16/48 = 1/3
3x-5y=4------eq1
4x+3y=15-------------eq2
multiply 3 to first eq and 5 to second eq.
9x-15y=12
20x+15y=75
subtract both eqs
29x=87 x=3 so put x in eq 1
3(3)-5y=4
5y=5
y=1