Final answer:
The total cost will be equal when purchasing 6 T-shirts from each company.
Step-by-step explanation:
The correct sentence that is true regarding the given system of equations is option c. The total cost will be equal when purchasing 6 T-shirts from each company.
This is because the total cost of purchasing T-shirts from each company can be determined by the equation:
Cost of T-shirts from Company A = Price per T-shirt from Company A x Number of T-shirts
Cost of T-shirts from Company B = Price per T-shirt from Company B x Number of T-shirts
Since both companies offer the same price per T-shirt and the number of T-shirts is 6 from each company, the total cost will be equal.