Respuesta :

wegnerkolmp2741o

Answer:

40

Step-by-step explanation:

9a + 9b + 9c = 5

We want 72a

72a/9a = 8  so multiply the first equation by 8

8(9a + 9b + 9c) = 5*8

72a +72b +72c = 40

altavistard

Answer:

40

Step-by-step explanation:

Divide all three terms of 72a + 72b + 72c by 8.  Result:  8(9a + 9b + 9c).

We are told that 9a + 9b + 9c = 5.    Thus, 8(9a + 9b + 9c) = 8(5) = 40

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