Question

Rezolva rezolva21-7x=7

Answer 1

[tex]21-7x=7\\ 7x=21-7\\ 7x=14\\ x=14/7\\ x=2\\\\ Proba:21-7*2=21-14\\ ~~~~~~~~~~~~~~~~~~~~~~~~=7[/tex]

Answer 2

Rezolvare:
21-7x=7
7x=21-7
7x=14
x=14:7
$x=\boxed{2}$
Proba:21-7*2=7
21-14=7