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a+b+c=18 iar 2a+b+2c=25 atunci calculati (a+c)x(3a+2b+3c).
Ajutorrrrr pleaseeeee!!!!!!!!

Răspuns :

Dixie
a+b+c=18
2a+b+2c=25
----------------(+)
3a+2b+3c=43

2a+b+2c=25
a+b+c=18
----------------(-)
a+c=7

(a+c)*(3a+2b+3c)=7*43=301

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