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Cine face si asta plz

Cine Face Si Asta Plz class=

Răspuns :

Răspuns:

2.

a)x = 15•7/3 = 35

b)2(2x+5) = 11(3x-7)

4x+10=33x-77

-29x = -87 =>x=3

3.

x=3y/5

(9y/5 + 7y) : (12y/5 + 2y) =

44y/5 • 5/22y =

44/22 =

2

4.

x/5=y/6=z/10=k

x=5k

y=6k

z=10k

10k+18k-20k=128

8k=128

k=16

x=80

y=96

z=160

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Vezi imaginea ALISHAMASHA