Question

Se dau relațiile:
a : b = 3 rest 5
c : b = 2
a + b + c = 59
Ce valoare are a?
a. 54; b. 18; c. 32; d. 9. .

Answer 1

c:b=2

==>c=2b

a:b=3 rest 5==>=3b+5

a + b + c=59

==> 3b+5+2b+b=59

6b=59-5

6b=54

b=9

==>c=2b=18

a=3b+5=3×9+5=27+5=32

Answer 2

Răspuns:

a:b=3 rest 5=>a=3b+5

c:b=2=>c=2b

a + b + c=59

3b+5+2b+b=59

6b=59-5

b=54:6=>b=9

a=3×9+5=>a=32

raspuns c.