Question

Urgenttt!!
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Daca se poate si poza cu rezolvarea!

Answer 1

1.

a=3b

ma=3b+b  :  2 = 4b:2 = 2b=24, b=24:2=12 si astfel a=3b=3*12=36

2.

ma(a,b,c) = 14 , a+b+c = 3x14 =42

ma(a,b,c,d)= (a+b+c+d) : 4 = (42+22) : 4 = 64:4 = 16.

Answer 2

1) ( a + b ) / 2 = 24 → media aritmetica a doua numere

a + b = 2 × 24

a + b = 48 → suma celor doua numere

a / b = 3  ⇒   a = 3 × b

3 × b + b = 48

4 × b = 48  ⇒   b = 12

a = 3 × 12   ⇒  a = 36

_______________________

2)

( a + b + c ) / 3 = 14 → media aritmetica a trei numere

a + b + c = 3 × 14

a + b + c = 42 → suma celor trei numere

( a + b + c + d ) / 4 = ( 42 + 22 ) / 4 = 64 / 4 = 16 → media aritmetica a celor 4 numere