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b-lata oli
a=b+6
(a-4)=2(b-4)
no i mamy:
a=16
b=10
karol ma 16 a ola ma 10
y - wiek karola
y = x + 6
y-4 = 2(x-4)
y-4 = 2x-8
x+6-4 = 2x-8
-x = -10
x = 10
y = 16
ola ma 10 lat, karol 16
y-wiek oli
i układ równań
x=y+6
(x-4)=2(y-4)
powinno wyjść
x=16
y=10