Question

Determina a b și c stiind ca: a+b=700 b+c=500 a+c=800

Answer 1

a+b=700

b+c=500

a+c=800

700+600+800=a+b+b+c+a+c

2100=2a+2b+2c

2100:2=a+b+c

1050=a+b+c

a=1050-500

a=550

b=700-550

b=150

c=500-150

c=350

Answer 2

a=700-b,b+700-b= 500,2b=-200,b=-100,a=800,c=0