Question

Daca a+b=35 si b+c=17 calculeaza a)a+2b+c, b) a-c ,c)2a +5b+3c, d)3a +b-23

Answer 1

a) a+2b+c=a+b+b+c=35+17=52
b) a-c= (35-b)-(17-b)=35-b-17+b=18 - > se reduce b
c) 2a+5b+3c=2(35-b)+5b+3(17-b)=70-2b+5b+51-3b=70+51=121 ->se reduce b
d) (35-b)+b-23=35-b+b-23=12 - > se reduce b