Mama jest 7 razy starsza od córki. Za 10 lat będzie miała w sumie 60 lat . obliucz ile lat ma obecnie każda z nich
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m - wiek mamy
c - wiek córki
m = 7c
m + 10 + c + 10 = 60
m = 7c
m + c + 20 = 60
7c + c + 20 = 60 |-20
8c = 40
c = 5
m = 7 * 5
m = 35
m = 35
c = 5