Question 1107866
If it's: 3/x + 6/(x + 3) =8/(x + 1), then you should get:
3(x + 3)(x + 1) + 6x(x + 1) = 8x(x + 3), and after combining like-terms, you should get: x^2 - 6x + 9 = 0
x = 3

BTW, your right side IS NOT 8. Instead, it's 8x(x + 3) = 8x^2 + 24x. That's your error.