parisgaby
parisgaby
12-06-2020
Mathematics
contestada
Cual es el resultado?
Respuesta :
arisu03
arisu03
12-06-2020
La respuesta es x ≥ 7
7 - 5x ≤ 42 [original]
-5x ≤ 35 [restar 7]
x ≥ 7 [divide entre -5]
La razón por la cual el signo ≤ se convierte ≥ es que -5 es un número negativo. Al dividir por cualquier cifra negativa, el signo cambia a su contrario en la desigualdad.
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