Given :
U.S shirts charge $0.25 per shirt plus a one time charge $5 to set up a T-shirt design.
Hot shirts advertise what it makes custom T-shirts for $0.35 each with a one time set up fee for $2
So, for U.S shirts , let the number of shirts = x
So, total charge : y = 0.25x + 5
And for hot shirts, let the number of shirts = x
So, total charge : y = 0.35 x + 2
We need to find the number of shirts when the charges are equal
So,
solve for x, combine the like terms :
And the total charge will be : y = 0.35 * 30 + 2 = 12.5