I think it's the answer on the farthest to the left.
(a) is the right answer
C=4 and A=-8
so AC= 4 - (-8) = 4 + 8
AC=12
Start by simply rewriting the equation
x-6y=48
Then transfer any other variables or numbers through addition or subtraction so that the y is isolated on one side of the equals sign
(in this case, subtract the x so that it moves to the other side of the equal sign)
-6y =48 -x
Finally, do any multiplication or division to cancel out anything still attached to the y.
y = -8 +

(in this case, divide by -6)
Now the y has been fully isolated on one side of the equal sign and you can see that x - 6y = 48, solved for y, is <span>y = -8 +

.
I do not see any way to simplify this further, though it is possible I am missing something.</span>
Core fitness refers to exercises to activate the muscles in a location called the core of your body. Hope this helps!