Let me show you a website that has saved my behind so many times in high-school...
https://www.cymath.com/
It's 3 (total number of have rabbits that's 43 - Have rabbits which is 40) 43-40= 3
You know that 3 times 2 is 6 so 30'times 20 equals 60
T=26
you just add 7 to the other side with 19 which gives you the answer
