3/4+2/3= 17/12
Step-by-step explanation:
Simple problem:
When simplifying 3(x-6) they subtracted 3 instead of multiplied by 3.
3(x-6) should be 3x-18.
Now when you simplify:
3x-18+4x+12-6x
Which is x -6 =0
Or x =6
There is no power of 4 that is to 0
Probably you are supposed to compute

Factorize the numerator and denominator, then simplify: