Question

daca  c = 100  si 5 x a + 5 x b =35
aflati  71 x  a + 71 x b + 83 x c 
multumesc 

Answer 1

5*a+5*b=5*(a+b)=35, a+b=35/5=7
71*a+71*b+83*c=71*(a+b)+83*c=71*7+83*100=497+8300=8797

Answer 2

5* (a + b) = 35
a + b = 35 :
a + b = 7
71 (a + b) + 83 * 100 = 71 * 7 + 8300 = 497 + 8300 = 8797