Răspuns:
→ in orice proportie, produsul extremilor este egal cu produsul mezilor
35/y=5/6
5y=35·6=>5y=210=>y=210:5=>y=42
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10/7=z/14
7z=10·14=>z=140:7=>z=20
____________________
3/8=6/t
3t=8·6=>t=48:3=>t=16
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u/18=11/9
9u=18·11=>u=198:9=>u=22
