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a:7=x
28:7=4
28+20=48
48:2=24
Odp Pani ma 28 lat
Dasz najjj
2x + 40 = y + 20
2x + 40 = 7x + 20
2x + 20 = 7x
20 = 5x
x = 4
y = 28
Odp. Ta pani ma 28 lat