Answer:
23 years old
Step-by-step explanation:
Let x = age of younger sibling.
Then, the age of the older sibling is x + 9.
x + x + 9 = 55
2x = 46
x = 23
Answer: 23 years old
Try equation y= 12+ 2x
you get 70
2x+4y=36 legs
2 for the two legged animals and 4 for the four legged animals
There are 10 animals so insert numbers that add up to 10 in for x and y
In this case x=2 y=8
Hope this helps!
Answer is B
Hope this helps :)