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Answer:

20 Tshirts

Step-by-step explanation:

Tshirts = $7.90 each

Shipping = $2

Total amount = $160

Amount of tshirts bought = y

7.90y + 2 = 160

7.90y = 160 -2

7.90y = 158

Divide both sides by 7.9

y = 158÷7.9

y = 20