Anna's hair is 24 inches long. This is 12 inches longer than her

Sister's. Write and solve an addition equation to find the length of her

sister's hair.

24x-12x=12x

her sisters hair is 12 inc. long

s+12=24 & s=12

Step-by-step explanation:

Annas hair is 24 inches and is longer than her sister's hair by 12 inches.

We can come to the conclusion her sister's hair is 12 inches less than Anna.

Sisters hair = s

s=24-12

but, this needs to be an addition equation, so we add 12 to both sides to move the negative 12 over.

s+12=24

after solving, you get

s=12

her sisters hair is 12 inches.