Răspuns :
4x + 10y + 3z = (2x + 3y) + (2x + 3y) + (4y + 3z) = 107 + 107 + 1800 = 2014
4X + 10 Y +3Z, stiind ca 2X +3Y =107 si 3Z + 4Y =1800
2* 2X + 3Y + 0Z = 107
0X + 4Y + 3Z = 1800
-------------------- (Adunare)
4X + 10Y + 3Z = 2014
2* 2X + 3Y + 0Z = 107
0X + 4Y + 3Z = 1800
-------------------- (Adunare)
4X + 10Y + 3Z = 2014