3 years ago

PLEASE HELP! WILL GIVE BRAINLIEST!

Mathematics

1 answer:

ANTONII [103]3 years ago

8 0

Answer:

(18+21+17+x)÷4=20

x=24 students

Step-by-step explanation:

(18+21+17+x)÷4=20

(56+x)÷4=20

56+x=20*4

56+x=80

x=80-56

x=24

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