# Alaina gained m dollars in the stock market two weeks ago. Last week, she gained twice as much. This week, she lost $50 more than she gained the first week. How do you write an algebraic expression for her total gain or loss? ##### 1 Answer Oct 8, 2017 G_(t3w)=2m-$50
(where ${G}_{t 3 w}$ is total gain over three weeks)

#### Explanation:

${G}_{t 1 w} = m$

${G}_{t 2 w} = m + 2 m$

G_(t3w)=m+2m-(m+$50) G_(t3w)=m+2m-m-$50)
G_(t3w)=2m-\$50