Question

If (7a – 5b ) : ( 7a + 3b ) = 3 : 8, then a : b is​

Answer 1

Answer:

7:5

Step-by-step explanation:

7a-5b = 3

7a+3b 8

8(7a-5b) = 3(7a+3b)

56a - 40b = 21a + 9b

56a - 21a = 9b + 40b

35a = 49b

a/b = 49/35 = 7/5

a:b = 7:5

Answer 2

Answer:

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Step-by-step explanation:

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