Step-by-step explanation:
A....
Solution ,





Change the sign of both side


B....
Solution,

Multiply the both side by the least common multiple to eliminate the fraction...




it's simple it's really easy so the answer is 2.0 1682
Tn=-2n+19
Step-by-step explanation:
Well in south africa we use Tn
Tn=a+(n-1)d
a=is the first term in the sequence which is 17
d=is the the difference between the terms which is - 2
Tn=17+(n-1)(-2)
Tn=17-2n+2
Tn=-2n+19
2 6/12 is the right answer
(12+13=25) (25+26=51) 51 is You're answer.
Hope this helps! :)