rozwiąż układy ruwnan a ) x+y=0 x-y=10 b ) 8x-6y=10 7x+y=5 c ) 12p-7r=-16 p-3r=-69 d ) 11k+17l=45 13k+l=15 e ) 8a+9b=36 a-16b=210 F ) 6a-21B=228 a-12b=21 błagam nz dzis</p
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a:)
x+y=0
x-y=10
2x=10 /2
x=5
5+y=0
y= -5
b:)
8x-6y=10
7x+y=5 / *6
8x-6y=10
42x+6y=30
50x=40/50
x=4/5
8*4/5-6y=10
x=4/5
y=0,60