Snap, Crackle, and Pop spend $150 on cereal in a grocery store.  Snap spends twice as much as Crackle.  Crackle spends 3 times as much as Pop.  How much did Pop spend?
Define a variable ** Let x represent the amount that Pop spent in $
How much money did Crackle spend? ** Crackle: 3x
How much money did Snap spend? ** Snap:2(3x)=6x
Write an equation ** x+3x+6x=150
Combine like terms ** 10x=150
Divide by 10 ** x=15
#### 15