Question

repede multumesc ex 3​

Answer 1

Răspuns:

Explicație pas cu pas:

a+b+c=200

a+b=4c (1)

a-b=2c (2)

(1)+(2) ->>a+b+a-b=4c+2c ->>>2a=6c->>a=3c

(1)-(2)->>>a+b-a+b=4c-2c->>>2b=2c->>b=c

a+b+c=200 ->>>Dar a+b=4c->>>4c+c=200-->>5c=200->>c=40

a=3c->>a=120  , b=c->>b=40

Deci a=120,b=c=40