What is the total lento of all the crystal in the bracelet ?1/2,5/8,3/4,1/2,3/8,1/2,3/4,3/8,3/ 4,5/8,1/2,3/8,5/8,3/4

step-by-step explanation:

first, eliminate the parenthesis:

3

x

+

2

−

4

x

second, group like terms:

3

x

−

4

x

+

2

third, combine like terms:

(

3

−

4

)

x

+

2

→

−

1

x

+

2

→

−

x

+

2

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.

b and c

step-by-step explanation: