Răspuns:
Explicație pas cu pas:
x + 4 × y = 3 × y + 2 × z = 14
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Deduc:
x + 4 × y = 14 [ × 5
3 × y + 2 × z = 14 [ × 3
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5 × x + 20 × y = 70
9 × y + 6 × z = 42
________________________ scad relatiile
5 × x + 11 × y - 6 × z = 70 - 42
5 × x + 11 × y - 6 × z = 28
m = 28