How do i do this? can someone me ?

well u just sub in 4 for c soo 2(4) + 5 is 8+5 which is 13

2(4)+5=13 plug in c and multiply then add

1 x=22.52

2: 65/39=604+39x

65x-39x=604

26x=604

x=604/26

×=23.23

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.