shammatt2007 shammatt2007

23-01-2022
Mathematics

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If 5a – 3b = 7 and b = 2a –4, what is the value of a?

Respuesta :

semsee45 semsee45

23-01-2022

Answer:

a=5, b=6

Step-by-step explanation:

Substitute b = 2a - 4 into 5a - 3b = 7:

5a - 3(2a - 4) = 7

5a - 6a + 12 = 7

a = 5

Now use the found value of a to find b by using b = 2a - 4:

b = 2(5) - 4 = 10 - 4 = 6

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