steven is 9 less than half ann's age. stevens age is 12 years old. what's anns age

2 answers

S = A/2 - 9 ... 12 = A/2 - 9 ... 21 = A/2 ... A = ?
12 = .5A - 9

Add 9 to both sides, then multiply both sides by 2 to find Ann's age.