Anne bought a necklace for each of her three sisters.

Question

She paid $7 dollars for each necklace. Suppose she had $9 dollars left. Write and solve an equation to find out how much money Anne had initially to spend on each sister.

Answer 1

She bought 3 necklaces at 7 dollars each.

 

We're solving for X, her initial amount.

 

We have X - 7*3 = 9

X - 21 = 9

X = 9+21 = 30

She had 30 dollars initially.