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M=3E
T=M+4
E-3+3E+3E+4=89
5E+3E=89+3-4
8E=88
E=11 ---> wiek Ewy
Ula= 11-3=8
Mama= 11*3=33
Tata=33+4=37
Mam nadzieję że pomogłam :)
Mama x*3
Tata(x*3)+4
Ewa x
Ula x-4
x+x-3+x*3+(x*3)+4=89
2x-3+3x+3x+4=89
8x+1=89
8x=89-1
8x=88/:8
x=11
Mama 33
Tata 37
Ewa 11
Ula 8