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aleksandr82 [10.1K]
3 years ago
13

PLEASE HELP!!! I PUT 50 POINTS

Mathematics
2 answers:
Lubov Fominskaja [6]3 years ago
7 0

Answer:

7

Step-by-step explanation:

1/3 =<em> </em><em>?</em><em>/</em>21

1*?<em> </em>=?

3*? = 21

1*7 = 7

3*7 = 21

Eduardwww [97]3 years ago
4 0

Answer:

x=7

Step-by-step explanation:

7 times 3 =21   and 21 times 1 =21           cross multiply or butterfly method

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