Question

Bo's sister Anna is 3/4 his age minus 1 year(s). She is 11 years old.

Answer 1

X = Bo’s age

3/4x - 1 = 11
3/4x = 12, then multiply by the inverse of 3/4, which is 4/3
x = 48/3 = 16

Check the answer:
3/4(16)-1 = 11
12 - 1 = 11