Question

Sustituye a por un número entero que haga que la igualdad sea cierta:
a) 5 ∙ = −20
b) 40 : a = -10
c) a : (-8) = 2
d) ∙ (−9) = 27

Por favor ayuda esto es una tortura. Doy 5 estrellas si alguien me ayuda!!!

Answer 1

Answer:

This is that easy. Just applying algebraic operations and the fact that the reals are a field...

(a) 5a = -20 implies a = -4

(b) 40/a = -10 implies a = -4

(c) a/(-8) = 2 implies a = -16

(d) a(-9) = 27 implies a = -3

I used / instead of : for division. Is the same thing.