Question

A={a+2b; a-b} B={6;21} son iguales , calcular a × b

Answer 1

Sería igualar :

=> a-b=6
a=6+b

=> a+2b=21
=> (6+b) +2b=21
=> 3b=15
=> b =5

Hallamos a :
a=6+b
a=6+5
a= 11

=> calcular a x b
5 x 11 =55

Espero te sirva !!