What you have done is ignored pemdas and skipped division. x/y(y+z) would have the division done first and then you distribute the result. So distribute x/y into (y+z) to get x+zx/y. You can still distribute but it must be in the right order. Substitute back in and you get 6+1*6/2 = 9
What you have done is ignored pemdas and skipped division. x/y(y+z) would have the division done first and then you distribute the result. So distribute x/y into (y+z) to get x+zx/y. You can still distribute but it must be in the right order. Substitute back in and you get 6+1*6/2 = 9