Equivalent expressions for 4a t a t a

Answer 1

assuming that "t" means "+",

4a+a+a
= 4a + 1a + 1a
= (4+1+1)a
= 6a

the a's add up just as

4 oranges + 1 orange + 1 orange = 6 oranges

4+1+1 of anything make 6 of that thing. In this case, "a"