Question

Malia has saved $18.50 to buy a hamster cage that costs $30. Which equation can she use to find s, the additional amount she needs to save?

Answer 1

Let x=amount of money she will need to save

18.50+x=30

If you need to solve:
Subtract 18.5 from both sides
x=11.5

Answer 2

They give you the whole entire worth of the cage and it 30. so I believe it is s + 18.50= 30
Worked out
s + 18.50= 30
-18.50. 18.50
s = 11.50