Question

Rezolvati in Z ecuatiile :
a) 5x+11=66
b) x:(-3)= -- 12
c) 120 : x= 30

Answer 1

Răspuns:

Explicație pas cu pas:

a)

$\displaystyle 5x+11=66\\5x=66-11\\5x=55\\x=55:5\\x=11$

b)

$\displaystyle x:(-33)=-12\\x=(-12)(-33)\\x=396$

c)

$\displaystyle 120:x=30\\x=120:30\\x=4$

11, 396, 4∈Z