Question

Please help me, I dont know this :double s, then subtract t from the result

Answer 1

Double s is usually written 2s
Then just subtract t
The answer will be 2s - t

Answer 2

Basically just convert this into an equation:
Let’s use “x” as the result
“•” is the multiplication symbol

Double s: s•2
Subtract t from result: =x-2

So, s•2=x-2