25-09-2020
Mathematics

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meredith48034 meredith48034

27-09-2020

Answer:

Step-by-step explanation:

9t + 15s = 246

t + s = 20

9t + 15s = 246

-9t - 9s = -180

6s = 66

s = 11 sweatshirts

t + 11 = 20

t = 9 t-shirts

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