Question

$x + 4 \times y = 3 \times y + 2 \times z = 14$
Aflați
$m = 5 \times x + 11 \times y - 6 \times z$
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Answer 1

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