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y-wiek syna
x=y+28
x-2=3∧(y-2)
x-y=28
x-2=3y-6
x-y=28
x-3y=-4/∧(-1)
x-y=28
-x+3y=4
____________-
2y=32/:2
y=16
x=16+28=44
x=44
y=16