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Lumynita
a fost răspuns

Compara valorile y,z: y×2=(7-4:4)×3,Z×6=16:4×2-0×9+3×3+1..E adevărat ca y=3×z

Răspuns :

y×2=(7-4:4)×3
2y=(7-1)×3
2y=6×3
2y=18
y=18:2
y=9
z×6=16:4×2-0×9+3×3+1
6z=4×2-0+9+1
6z=8-0+9+1
6z=18
z=18:6
z=3
y=3×z
9=3×3
9=9 (A)

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