Question

Naaaa dziś pillne !!!

Rozwiąż równania ;

a)4/x=5/-9

b)2-b/3=5/3

c)z-3/6=z-4/5

Answer 1

a) 4/x = 5/-9

-36 = 5x |:5

x = -7,2

 

b) 2-b/3 = 5/3

(2-b)*3 = 15

6 - 3b = 15

-3b = 9 |: (-3)

b = -3

 

c) z-3/6 = z-4/5

(z-3)*5 = (z-4)*6

5z - 15 = 6z - 24

-z = -9 |* (-1)

z = 9