Answer:
y=10
Step-by-step explanation:
2y+3+9y-7+7y+4=180
18y=180
combine the y's and the regular numbers
17y=51
divide 51 by 17
y=3
4th term+5th term =
5th term =
4th term =
5th term=
Common difference = 5th term - 4th term