Algebra
1.Rozwiaz uklad rownan
a)
{x+y=6
x-y=2
b){x+y=7
x-y=3
c){x-y=-2
x+3y=-10
d){2x+y=4
3x-y=1
a) x+y=6
x=6-y
6-y-y=2
4=2y
y=2
x+y=6
x+2=6
x=4
spr.x-y=2
4-2=2
2=2
L=P
x+y=7
x=7-y
7-y-y=3
7-2y=3
x-2=3
x=5
spr x+y=7
5+2=7
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a) x+y=6
x-y=2
x=6-y
x-y=2
x=6-y
6-y-y=2
x=6-y
4=2y
y=2
x+y=6
y=2
x+2=6
x=4
spr.x-y=2
4-2=2
2=2
L=P
x+y=7
x-y=3
x=7-y
x-y=3
x=7-y
7-y-y=3
7-2y=3
y=2
x-y=3
y=2
x-2=3
x=5
spr x+y=7
5+2=7
L=P