Question

help.........................coroana​

Answer 1

Răspuns:

a=15

b= 36

c= 39

Explicație pas cu pas:

a+b+c=90

{a, b, c} d.p {5, 12, 13}

a b c a+b+c. 90

-- = --- = --- => ------------=> -------=> 3

5 12 13 5+12+13 30

a

-- =3 => a= 3x5 a=15

5

b

--- = 3 => b= 3x12 b= 36

12

c

--- =3 => c= 39

13

Answer 2

Răspuns:

Explicație pas cu pas:

a+b+c=90

a/5=b/12=c/13

b=12a/5

c=13a/5

a+12a/5+13a/5=90

(5a+12a+13a)/5=90

30a/5=90

6a=90

a=15

b=12a/5=12·15/5=12·3=36

c=13a/5=13·15/5=13·3=39