Răspuns :
2x + 3y = 17 I · 2 4x + 6y = 34
se aduna 4y + 3z = 74
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atunci 4x + 10y + 3z = 34 + 74 = 108
se aduna 4y + 3z = 74
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atunci 4x + 10y + 3z = 34 + 74 = 108
2x +3y =17
4y + 3z =74
4x +10y +3z se poate scrie si asa :
2x +3y + 4y +3z + 2x +3y
-------- -------- --------
↓ ↓ ↓
17 + 74 + 17 = 108
4y + 3z =74
4x +10y +3z se poate scrie si asa :
2x +3y + 4y +3z + 2x +3y
-------- -------- --------
↓ ↓ ↓
17 + 74 + 17 = 108