O rezolvam prin metoda reducerii la unitate:
6p+3t=48 I x 2
5p+2t=35 I x 3 si le scad(medota reducerii), astfel reducem(dispar cele cu t)
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15p -12p = 105-96
3p=9
p=3 lei
t=35-15 : 2 =20:2=10 lei
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R: 4p+7t=4x3 + 7x10=12+70=82 lei