Explicación paso a paso:
8 + 2 + 5 = 15
9 + 1 + 5 = 15
7 + x + 4 = 15
7+4=11 15-11=4
Así que "x" equivale a 4.
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Explicación paso a paso:
8 + 2 + 5 = 15
9 + 1 + 5 = 15
7 + x + 4 = 15
7+4=11 15-11=4
Así que "x" equivale a 4.
jsjjskjskjsjkjskjsk jskjskjskjskjsjsk