Diego's sister is twice his age minus 9 years. she is also as old as half the sum of the ages of diego and both of his 12-year-old twin brothers. write and solve an equation to find the ages of diego and his sister.

Diego's age is 14 years.

His sister's age is 19 years.

Step-by-step explanation:

Let d represent Diego's age.

We have been given that Diego's sister is twice his age minus 9 years.

The age of Diego's sister would be .  

We are also told that she is also as old as half the sum of the ages of Diego and both of his 12-year-old twin brothers. We can represent this information in an equation as:          

Let us solve for x:

Therefore, Diego's age is 14 years.

Therefore, his sister's age is 19 years.

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b

c. he organized a political resistance group based on islam.