Answer:
the T-shirt cost is $16
Step-by-step explanation:
first, we know the total cost of the shirt and book was $28 so we substract 12 from 28 wich gives us 16 so the cost of the shirt is $16.
Top one is x+3, bottom one is 5
To help you out I save your picture and explain the process. The only thing tht confuses me is problem #!6. But I hope I helped you out in the slightest bit