Respuesta:
x > 19
Explicación paso a paso:
21 - 2 - x < 0
19 - x < 0
-x + 19 < 0
-x < 0 - 19
-x < -19
-x(-1) > -19(-1)
C.S. = (19, ∞)
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Respuesta:
x > 19
Explicación paso a paso:
21 - 2 - x < 0
19 - x < 0
-x + 19 < 0
-x < 0 - 19
-x < -19
-x(-1) > -19(-1)
x > 19
C.S. = (19, ∞)