01-12-2020
Mathematics

contestada

El producto de 3 y un número, disminuido en 28 es 89. Cuál es el número?

Respuesta :

01-12-2020

supone que este número es sustituido por la letra m

(3xm) -28 = 89

tenemos que sumar 28 en los dos lados

3xm = 117

para saber que numero es m tenemos que dividir por 3 los dos lados

m = 117/3

m = 39

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