<span>|x+2|-2х+1=0
</span><span>|x+2|=2х-1
х₁+2=2х₁-1
х₁=3
х₂+2=1-2х₂
х₂=-1/3</span>
3x + y = 1
(x + 1)/3 - y/5 = 2 /*15
3x + y = 1
5(x + 1) - 3y = 30
3x + y = 1
5x + 5 - 3y = 30
3x + y = 1 /*3
5x - 3y = 25
9x + 3y = 3
5x - 3y = 25
-------------------- +
14x = 28
x = 2
y = 1 - 3x = 1 - 3*2 = 1 - 6 = - 5
Ответ
( 2 ; - 5)
Ху²-у+у²-ху=ху²+у²-ху-у=у²(х+1)-у(х+1)=(х+1)(у²-у)=(у²-у)(х+1)=у(у-1)(х+1)