Question

answer please fast....

Answer 1

Answer:

Hope you will understand the answer!!!

Step-by-step explanation:

a/b=3/4

3a/b= 3*2/5 =6/5

3a+b/3a-b= 6+5/6-5........(by componendo and dividendo)

therefore, 3a+b/3a-b=11/1

                                   =11

REGARDS!!!

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Answer 2

Answer:

Step-by-step explanation:

a/b =3/4

Let

a=3k

b=4k

(3a+b)/(3a-b)

=(3×3k +4k) / (3×3k -4k)

=(9k+4k)/(9k-4k)

=13k/5k

=13/5

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