Question

Afla care beculete de fiecare culoare au folosit copiii pentru decorarea unei sali de carnival,daca beculete rosii so albastre au cost 126,beculete albastre so verzi au cost 95,iar beculete rosii si verzi au fost 143.

Answer 1

r,a,v=?
r+a=126
a+v=95
r+v=143
r+a+a+v+r+v=126+95+143
2r+2a+2v=364
2(r+a+v)=364
r+a+v=364:2
r+a+v=182
r+95=182  => r=182-95  => r=87
87+v=143  => v=143-87  => v=56
a+56=95  => a=95-56  => a=39
Solutia: r=87 (beculete rosii)
              a=39 (beculete albastre)
              v=56 (beculete verzi)
Total beculete: 87+39+56=182