The answer is
4.25.
All you have to do is find the difference (0.5), half it (0.25) and add it to the smallest number.
Answer: t=11 :))
Step-by-step explanation:
15+6t=81
6t=81-15
6t=66
6t/6=66/6
t=11
23
because
the pattern is
(5 10) ..1.. (15 20) ..2.. (25 30) ..3..
..1... = 3
..2.. = 13
so ..3.. = 23
2 times 8 equals 16 + 10 equals 26