Siemka zadanie 1 Rozwiąz układ równań :
x-2y=7
3x+y=7
3x+y=7 *2
6x+2y=14 +
7x=21:7
x=3
3-2y=7
-2y=7-3
-2y=4:(-2)
y=-2
Proszę o naj:)
x-2y=7/ *(-3)
-3x+6y=-21
+________
7y=-14/:7
3X-2=7
3x=9/:3
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x-2y=7
3x+y=7 *2
x-2y=7
6x+2y=14 +
7x=21:7
x=3
x-2y=7
3-2y=7
-2y=7-3
-2y=4:(-2)
y=-2
Proszę o naj:)
x-2y=7/ *(-3)
3x+y=7
-3x+6y=-21
3x+y=7
+________
7y=-14/:7
y=-2
y=-2
3X-2=7
y=-2
3x=9/:3
x=3
y=-2