Chris purchased 2 t shirts and a bobble head and it cost $101.25.
Dominic purchased 3 t shirts and 2 bobble heads for $138.75.
From this information we can derive two equations:
2T + 1B = 101.25 and
3T + 2B = 138.75
We can add the two equations to obtain:
5T + 3B = 140.00
At this point, you can solve the final equation for one of the variables, substitute that solution into one of the original equations, and solve for the variable.
Once you have the value of one variable, you will be able to solve for the other variable.
