rozwiaz układ ruwnan :
x+2y=9
y-1=3x
prosze z obliczeniami
z gury thx daj naj
-3x+y=1/ *(-2)
6x-2y=-2
7x=7 /7
x=1
1+2y=9
2y=8 /2
x+2y=9y-1=3xx+2y=9 /*3-3x+y=13x+6y=27-3x+y=1+_________ 7y=28 /:7 y=4x+2y=9-3x+y=1 / (-2)x+2y=96x-2y=-2+_________ 7x=7 /:7 x=1
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x+2y=9
y-1=3x
x+2y=9
-3x+y=1/ *(-2)
x+2y=9
6x-2y=-2
7x=7 /7
x=1
1+2y=9
2y=8 /2
x+2y=9
y-1=3x
x+2y=9 /*3
-3x+y=1
3x+6y=27
-3x+y=1
+
_________
7y=28 /:7
y=4
x+2y=9
-3x+y=1 / (-2)
x+2y=9
6x-2y=-2
+
_________
7x=7 /:7
x=1