Answer:
54
Step-by-step explanation:
Answer:
32/35 or 0.914
Step-by-step explanation:
Answer:
16
Step-by-step explanation:
To solve, we can use an equation finding the average of the siblings'ages.

Answer:
x = 7
Step-by-step explanation:
Start by solving for
which is a common expression for both equations. Then in the first equation:

and in the second equation:

Now we make the two
expressions equal so we get:
