`(2x + 1/3x) = 5`
`(2xxx3x+1)/3x = 5`
`(6x^2+1) = 15x`
`(5x)/(6x^2 + 20x + 1)`
`= (5x)/(6x^2 + 1+20x)`
`= (5x)/(15x+20x)`
`= (5x)/(35x)`
`= 5/35`
`= 1/7`
So the answer is` (5x)/(6x^2 + 20x + 1) =1/7`
Correct answer is a).
`(2x + 1/3x) = 5`
`(2xxx3x+1)/3x = 5`
`(6x^2+1) = 15x`
`(5x)/(6x^2 + 20x + 1)`
`= (5x)/(6x^2 + 1+20x)`
`= (5x)/(15x+20x)`
`= (5x)/(35x)`
`= 5/35`
`= 1/7`
So the answer is` (5x)/(6x^2 + 20x + 1) =1/7`
Correct answer is a).