50 pts
select all ratios that are equivalent to 4/8

6/12
10/20
5/10
1/2
3/4
1/3
7/5

6/12

10/20

1/10

1/2

4/8 is half, and all of the ones above that I picked are 1/2 when simplified.

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9