So it would be in six years because if you do it, it would be
garden 1: 2,4,6,8
garden 2: 3,6,9
and the lowest common multiple is 6 so in 6 years is when it will happen again
No because it only works with addition and multiplication
9+(-6-3)=(9-6)-3 is true tho
9-(6-3)=9-(3)=6
(9-6)-3=(3)-3=0
so not equivilent
