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y - waga worka
x - 2 = 2y
x + y = 38
x - 2y = 2
x + y = 38 /*2
x - 2y = 2
2x +2y = 76
3x = 78
x = 26
x + y = 38
26 + y = 38
y = 12
skrzynia - 26 kg
worek - 12 kg
2x+2kg-skrzynia
38kg=x+2x+2kg
38kg=3x+2kg. |-2kg
36kg=3x. |:2
12kg=x
12kg+12kg+2=26kg
Odp: Worek waży 12kg, a skrzynia 26kg.
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