Question

va rog dau coroana
cu rezolvare​

Answer 1

a)

2

2x5 = 10

3x5 = 15

b)

42

5x7 = 35

6x7 = 42

c)

5

2/(1/5) = x/(1/2) => 10 = 2x => x = 5

d)

6

15/(1/8) = 20/(1/y) => 120 = 20y => y = 6

Answer 2

Răspuns:

x/10=3/15

inmultim mezii cu extremii

15x=3·10=>x=30:15=>x=2

_______

5/35=6/y

5y=6·35=>y=210:5=>y=42

_________

2/(1/5)=x/(1/2)

2·5/1=x·2/1

2·5=2x=>x=10:2=>x=5

________

15/(1/8)=20/(1/y)

15·8/1=20·y/1

15·8=20y

y=120:20=>y=6