(2х+3х)-(5х-11) = 7х+(13-2х)
2х+3х-5х+11 = 7х+13-2х
11 = 7х+13-2х
-5х = 13-11
-5х = 2
х = -2/5 = -0,4
(2х+3х)-(5х-11) = 7х+(13-2х)
2х+3х-5х+11 = 7х+13-2х
11 = 7х+13-2х
-5х = 13-11
-5х = 2
х = -2/5 = -0,4