URGENT ex 9 ‼️⭐️⭐️⭐️⭐️​

Răspuns:

Explicație pas cu pas:

l---------l---------l---------l---------l               (a) }

l---------l---------l---------l---------l---------l    (b) }  45 suma

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4 seg +5 seg=9 segmente egale

45= suma celor 9 segmente egale

45:9=5 un segment

5x4=20 (a)

5x5=25 (b)

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x= un segment

4x=a

5x=b

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a+b= 45

4x+5x=9x

9x=45

x=45:9

x=5

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4x=4*5=20 (a)

5x=5*5=25(b)

Răspuns:

[tex]a:4=b:5= > 5a=4b\\\\a+b=45/*5\\\\5a+5b=225\\\\4b+5b=225\\\\b=225:9= > b=25\\\\a=45-25= > a=20[/tex]