Question

calculează valoarea expresiei: E=5×(a+b)+3×(b+c)+5×(c-5), stind ca a=2, iar b+c=12

Answer 1

E=5×(a+b)+3×(b+c)+5×(c-5), stind ca a=2, iar b+c=12
E=5a+5b+3*12+5c-25
E=5*2+36-25+5b+5c
E=10+11+5*(b+c)
E=21+5*12
E=21+60
E=81