a)7
In order to solve this you go backwards.
start by canceling out the 3 by adding 3 to both sides of the equation:
4t-3=25
+3 +3
4t=28
To find the value of T now you need to make it into a single digit. To do this you need to cancel out the 4 by dividing both sides of the equation by 4.
4t=28
÷4 ÷4
t=7