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Cual es el resultado?

Cual es el resultado?-example-1

1 Answer

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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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User Vineel
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