Question

VA ROG MULT AJUTATIMA
Aflați cifra x din egalitățile:
a) 0,(x) = 5b) 3,4(x)
b) 3,4(x) = 311; c) 4, (x) = 4
=45; d) 5,(x) = 53; e) 5,(x) = 5 13
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Answer 1

Răspuns:

a) 0,(x) = 5

x/9=5

x=9×5

x=45

b) 3,4(x) = 311;

(34x-34)/90=311

34x-34=90×311

34x=27990+34

34x=28024

300+40+x=28024

x=28024-340

x=27684

c) 4, (x) = 4

(36+x)/9=4

36+x=9×4

36+x=36

x=36-36

x=0

d) 5,(x) = 53;

(45+x)/9=53

45+x=53×9

45+x=477

x=477-45

x=432

e) 5,(x) = 5 13

(45+x)/9=5,13

45+x=9×5,13

45+x=46,17

x=46,17-45

x=1,17