Question

if 3^a-2b=27 and 9^a+b =3 then value of -a/b

Answer 1

Answer:

Step-by-step explanation:

9a + b = 3

B = 3-9a

3a - 2b = 27

Putting value of b

3a - 2(3-9a) = 27

3a - 6 + 18a = 27

21 a = 27 + 6

21 a = 33

A = 33/21

B = 3 - 9a

= 3- 9(33/21)

= 3 - 99/7

On taking LCM

= 21 - 99 ÷ 7

= -78 ÷ 7

-a/b = -(33/21) ÷ (-78/7)

= 33/21 × 7/78

= 11/78

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Answer 2

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