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Daca a+2b=10 si 3c-4d=100 , aflati
x=6a+12b+27c-36d

Răspuns :

a+2b=10 Ix6
3c-4d=100 Ix9
6a+12b=60
27c-36d=900
6a+12b+27c-36d=60+900
x =960
Alexa2002
a+2b=10
3c-4d=100
x=6a+12b+27c-36d
x=6(a+2b)+9(3c-4d)
x=6·10+9·100
x=60+900
x=960

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