Question

1 by X + 1 by X + 3 is equal to 13 by 40 ​

Answer 1

Answer:

1/x+1 + 1/x+3 = 13/40

x+3+x+1/(x+3)(x+1)=13/40

2x+4/x^2+x+3x+3=13/40

2x+4/x^2+4x+3=13/40

13x^2+52x+39=80x+160

i think you can solve it further now

hope it helps!!