x-wiek Asi
y-wiek Kasi
x+y=50
x=50-y
x+4=4(y-4)
x+4=4y-16
podstawiamy pod x
50-y+4=4y-16
-y-4y=-16-4-50
-5y=-70/:(-5)
y=14
x=50-14
x=36
odp.Asia ma 36 lat a Kasia 14 lat
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x-wiek Asi
y-wiek Kasi
x+y=50
x=50-y
x+4=4(y-4)
x+4=4y-16
podstawiamy pod x
50-y+4=4y-16
-y-4y=-16-4-50
-5y=-70/:(-5)
y=14
x=50-y
x=50-14
x=36
odp.Asia ma 36 lat a Kasia 14 lat