12. SUMA DWÓCH LICZB WYNOSI 12, A ICH RÓZNICA 2 . JAKIE TO LICZBY ?
x+y=12
x-y=2
2x=14
x=7
7-y=2
y=5
x=12-y
podstawiamy pod: x-y=2
12-y-y=2
10=2y
x=12-5=7
Odp: x=7 y=5
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x+y=12
x-y=2
2x=14
x=7
7-y=2
y=5
x=7
y=5
x+y=12
x-y=2
x=12-y
podstawiamy pod: x-y=2
12-y-y=2
10=2y
y=5
x=12-y
x=12-5=7
Odp: x=7 y=5