Question

A) 9 B)10 C)6 D) 12 E) 8​

Answer 1

Ответ: (С) y = 6
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Answer 2

x: z=2:5 ==>x=2z/5

x+3z=34

2/5z+3z=34

3 целых 2z/5=34

17z/5=34

z/5=2

z=10

y: z=3:5 ==>y=3/5z

y=10*3/5=2*3=6

Ответ: С