Raymond wanted to buy 8 t-shirt but he was short of $8.10. instead he bought 5 T-shirt and had $12.60 left. how much would he need to pay for 20 t-shirt?

$138

Step-by-step explanation:

Let the cost if a tee shirt be $T.

Since the amount of money Raymond have is constant,

8T -8.10= 5T +12.60

8T -5T= 12.60 +8.10

3T= 20.7 (simplify)

T= 20.7 ÷3 (÷3 throughout)

T= 6.90

Thus, cost of one t-shirt is $6.90.

Cost of 20 t-shirts

= 20(6.90)

= $138

a

step-by-step explanation: