BIG POINTS My sister is 16 years old. My brother says that his age minus eighteen is equal to my sister's age. How old is my brother? Write a equation with b as variable.
b= brother's age B-18=16 Since he said his age minus 18 is your sister, and your sister 16. All you have to do is add 18 to 16 to find your brother's age. 34=B
