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y- druga liczba
x-y=96
x=4y
układ równań
z czego wyliczamy
x= 96+y
x=4y
więc
4y=96+ y
3y=96
y=32
a x=128
x=4y}
x-y=96 |+y
x=96+y
96+y=4y |-y
96=3y |/3
y=32
x-32=96 |+32
x=128