x-2y=5
2x+3y=4
х=5+2у
2х+3у=4
х=5+2у
2(5+2у)+3у=4
2(5+2у)+3у=4
10+4у+3у-4=0
10+7у-4=0
7у+6=0
7у=-6
у=-6/7
х=5+2у
х=5+2*-6/7
х=5+(-12/7)
х=23/7
x-2y=5
2x+3y=4
x-2y=5
y=x/2-2.5
2x+3y=4
2x+3*(x/2-2.5)=4
3.5x-11.5=0
x=11.5/3.5
x=23/7
x-2y=5
23/7-2y=5
-12/7-2y=0
y=(-12/7)/2
y=-6/7
