Question

5/x-6x=4

Answer 1

Parentheses are required around numerators and denominators in fractional expressions.

Check if the problem is (as you typed it):
5/x - 6x=4
Multiply by x and simplify (x≠0)
5-6x²=4x
6x²+4x-5=0

or

5/(x-6) = 4
5 = 4(x-6) where x≠6
4x-24=5
4x=5+24=29
Divide by 4 on each side:
x=7.25