👤

stiind ca 7ab-7ac=105 si a=5,calculati b-c.
rezolvare  completa,va rog mult!!


Răspuns :

7 ab -7 ac = 105
7a (b - c) = 105
7 x 5(b - c) = 105
b - c = 105 : 35
b - c = 3
7 ab -7 ac = 105
7a (b - c) = 105
7 x 5(b - c) = 105
b - c = 105 : 35
b - c = 3