supongo que es 13... 20-13=7
Explicación paso a paso:
20 - x = 7
- x = 7 - 20
- x = -13
x = - 13 : (-1)
x = 13
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supongo que es 13... 20-13=7
Verified answer
Explicación paso a paso:
20 - x = 7
- x = 7 - 20
- x = -13
x = - 13 : (-1)
x = 13