Question

Daca a+b=15 si c=25, aflati: a+b+c; c×(a+b); c-(a+b); ac+bc; 2a+2b+c; 7a+7b-ac va rog mult ajutatima!!!!!

Answer 1

1. a) ac+bc=c(a+b)=10*7=70
b) ac-bc=c(a-b)=14*7=98
c) ab+bc=b(a+c)
   a+c=270:9=30
d) ac-bc=c(a-b)
c=120:20=6
 cu placere!! ^_^

Answer 2

15+25=40. 15x25=375,. 25-15=10 25. 30+25=55. 175+25=200