24-03-2021
Mathematics

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If a + b = 5 and 3a + 2b = 20, then what is 3a + b equal to?

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Respuesta :

24-03-2021

Answer:

17.5

Step-by-step explanation:

3a = 15

a =5 .

3 x 5 = 15

2b = 5

15 + 5 = 20

----------------------------

b = 2.5

2.5 ( B ) + 15 ( 3a ) = 17.5

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