Respuesta :

calculista

Answer:

[tex]2(y+2)[/tex]

Step-by-step explanation:

Let

y --->Mala's age

x---> sister's age

we know that

[tex]x=y+4[/tex] ---> equation A

so

The sum of ages of the sisters is

[tex]x+y[/tex]

substitute equation A in the expression of the sum of ages

[tex](y+4)+y=2y+4[/tex]

simplify

[tex]2(y+2)[/tex]