a+b = 16
a-b = 8
a = 16-b
16-b-b = 8
-2b = 8-16
-2b = -8 |:(-2)
b = 4
a = 16-4
a = 12
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x - y = 8
-----------
2x = 24
x = 12
12 - y = 8
y = 4
x-y=8
Dodajemy stronami.
2x=24
x=12
x=12
y=4
a+b = 16
a-b = 8
a = 16-b
16-b-b = 8
a = 16-b
-2b = 8-16
a = 16-b
-2b = -8 |:(-2)
a = 16-b
b = 4
a = 16-4
b = 4
a = 12
b = 4