3 years ago

Does anyone know this?

Mathematics

1 answer:

Lera25 [3.4K]3 years ago

4 0

Answer:

8/21

Step-by-step explanation:

-1/3 + 5/7=1×7 =-7/21 +15/21

- × -

3. 7

-7/21 + 15/21= -7+15 = 8/21

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