Question

Va rog mult repede și corecta!

Answer 1

Răspuns:

a) x/6=9/27----> aducem la numitor comun (9);(2)

9x/54=18/54==>9x=18 x=18:9 x=2

b)2/3=6/y----> prima fractie o amplificam cu 3

6/9=6/y ==>y=9

c)0,5/3=6/z

5/10 × 1/3 =6/z

5/30= 6/z

z=30×6/5=36

d) a/1,2=10/3

a/6/5=10/3

a/6×1/5=10/3

a=30×10/3=100

e) 2,1/b=7/4

21/10/b=7/4

21/10b=7/4

84=70b

b=6/5

f)1,8/u=1,12/2,52

9/5/u=1,12/2,25

9/5/u=28/25/63/25

9/5u=28/63

9/5u=4/9 simplifica fractia folosind inmultirea pe diagonala

81=20u

u=81/20

g)x+3/6=5/2

2(x+3)=30

x+3=15

x=15-3

x=12

h) 27/42=45/7×x

27/42=45/7x

9/14=45/7x

63x=630

x=10

sper ca ti-a fost de ajutor.

succes!