1.Rozwiaż uklad rownan:
a) ten mam zrobiony.
b) ∑-3x+2y=-1
2x-3y=1
c)∑-5x+3y=24
3x-5y=-24
d)∑-7x-3y=-11
5x-6y=16
e)∑2x+5y=-6
7x+4y=-21
f)∑8x+2y=6
-5x-6y=-18
Odp z neta *usuwane @@@@
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b) -3x+2y=-1 /*3
2x-3y=1 /*2
-9x+6y=-3
4x-6y=2
+______
-5x=-1
x=1/5
x=1/5
2x-3y=1
x=1/5
2/5-3y=1
x=1/5
-3y=3/5 /:(-3)
x=1/5
y=-1/5
c)-5x+3y=24 /*3
3x-5y=-24 /*5
-15x+9y=72
15x-25y=-120
+________
-16y=-48
y=-3
y=-3
3x-5y=-24
y=-3
3x+15=-24
y=-3
3x=-39
x=-13
y=-3
d)-7x-3y=-11 /*(-2)
5x-6y=16
14x+6y=22
5x-6y=16
+_______
19x=38
x=2
x=2
5x-6y=16
x=2
10-6y=16
x=2
-6y=6
x=2
y=-1
e)2x+5y=-6 /*(-4)
7x+4y=-21 /*5
-8x-20y=24
35x+20y=-105
+________
27x=-81 /:27
x=-3
x=-3
2x+5y=-6
x=3
6+5y=-6
x=3
5y=-12
x=3
y=-2 2/5
f)8x+2y=6 /*3
-5x-6y=-18
24x+6y=18
-5x-6y=-18
+________
21x=0
x=0
x=0
8x+2y=6
x=0
8*0+2y=6
x=0
2y=6
x=0
y=3
Mam nadzeje, że pomogłam
Pozdrawiam :)