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y - czterościany
x+y=7
12x+6y=60 //:6
x=7-y
2x+y=10
x=7-y
14-2y+y=10
x=7-y
y=14-y=10
x=7-y
y=4
x=3
y=4
daj naj;)
y - czterościany
x+y=7
12x+6y=60 //:6
x=7-y
2x+y=10
x=7-y
14-2y+y=10
x=7-y
y=14-y=10
x=7-y
y=4
x=3
y=4
y-szesciany
x+y=7 /*(-6)
6x+12y=60
-6x-6y=-42
6x+12y=60
dodajemy stronami:
-6x-6y+6x+12y=18
6y=18
y=3
x+3=7
x=4