Respuesta :

Answer:

20

Step-by-step explanation:

add 7 to 13 (20) and then subtract 7 from 20 and you get 13. hope it helps :)

christianangellight
The answer is 20.
1. add 7 to both sides
x=13+7
2. simplify 13+7 to 20.
x=20.

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