Hello!
We want to isolate t on one side of the equation. We will use inverse operations to get t alone a seen below. First we subtract b from both sides.
3y-b=7tx
We divide both sides by x
(3y-b)/x=7t
We divide both sides by 7
(3y-b)/x/7=t
Finally we rearrange our equation. We divide by both 7 and x. We could multiply them together and divide as a whole.
t=(3y-b)/7x
The correct answer is A.
I hope this helps!
