2s - 5 = - 11
2s = - 11 + 5
2s = - 6
s = - 6 / 2
s = - 3
Comprobación
2(-3) - 5 = - 11
- 6 - 5 = - 11
- 11 = - 11
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2s - 5 = - 11
2s = - 11 + 5
2s = - 6
s = - 6 / 2
s = - 3
Comprobación
2(-3) - 5 = - 11
- 6 - 5 = - 11
- 11 = - 11