14-06-2021
Mathematics

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Need help quick easy problem to solve pls help!

Need help quick easy problem to solve pls help class=

Respuesta :

tankisfun97 tankisfun97

14-06-2021

Answer:

C

Step-by-step explanation:

12b + 30f = 240

7b + 10f = 125

Multiply the second equation by -3

12b + 30f = 240

-21b -30f = -375

Add up the two equations

-9b = -135

b = $15

Substitute this value in one of the two equations

12 * 15 + 30f = 240

180 + 30f = 240

30 f = 60

f = $2

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