Kareem is mailing packages. Each small package costs him 2.80 to send. Each large package costs him 4.20. How much will it cost him to send 7 small packages and 6 large packages?

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

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step-by-step explanation:

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