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Dacă a+2b+c=17 si 2a+3b+2a= 23, atunci 5a+6b+5c este egal cu


Răspuns :

a+2b+c=17
2a+3b+2c=23
2a+3b+2c-(a+2b+c)=32-17
a+b+c=6
5a+6b+5c=17+6+6+6+6
5a+6b+5c=41
5a+6b+5c = ..............................
Vezi imaginea ALITTA