Question

Five less than the number 2t is at most 15. Find all possible values of t.

Answer 1

`We\: have\: an\: inequality:2t - 5 \leqslant 15 \\ \Leftrightarrow 2t \leqslant 20\Leftrightarrow t \leqslant 10`

Answer 2

let's set up the equation:

2t-5=15

let's add 5 to both sides

2t=20

divide both sides by two

t=10

substitute 10 back into the equation

2(10)-5

20-5

15 <------ Your answer