The answer is C that is X=7 and X=-1
multiple x through the given equation to get rid of a fraction. It will be

After that bring 6X to the LHS of the equation
so that it will look like the general equation that is

Use the quadratic formula (or any other approach to find the values of x
You will arrive at

The student messed up on step one. The proper factoring is (x-4) (x+2)
answer: 1117
the first block is 1000
the second is 100
the third is 10
then the last few count up to 7