If they each planted the same number then, 3(t+1)=3(2t-3)
Distribute that and you’ll get 3t+3=6t-9.
There are different ways to go from there but if you add 9 to both sides you’ll have 3t+12=6t, subtract 3t from both sides
12=3t and divide by 3 to get 4=t. Then to find how many they got simply plug 4 into both equations. Make sure they come out ewual
