Question

repede va rog , nu raspundeti gresit doar pt puncte vreau rezolvare explicata

Answer 1

Răspuns:

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Answer 2

Răspuns:

a. 7d=0,6×5/3

7d=6/10×5/3

7d=30/30

7d=1

d=1/7

b. 0,(3)·2,5=(4·3+1)/3·c

3/9·25/10=13c/3

75/90=13c/3

13c·90=75·3

1170c=225

c=(225/1170)⁽⁴⁵

c=5/26

c. x/3=7/3·4

x/3=28/3

3x=3×28

x=84/3

x=28

d. 0,5x·1,2=4,5·0,4

0,6x=1,8

x=1,8:0,6

x=3

e. 1,3·0,1(6)=2,(3)·13x

13/10·(16-1)/90=(23-2)/9·13x

13/10·15/90=21/9·13x

195/900=273x/9

273x·900=195·9

245700x=1755

x=(1755/245700)⁽1755

x=1/140

se pot simplifica termenii pe diagonala sa-ti fie mai usor