Melanie wants a new stereo. The new stereo costs $1,220. Melanie got $200 for her birthday, Melanie plans to work at a thrift store for 4 weeks. How much money does she need to earn? Use X as a variable.
Melanie needs to earn X amount of money to buy the new stereo.
Given that she already has $200 from her birthday, she still needs to earn $1,220 - $200 = $<<1220-200=1020>>1020.
Melanie plans to work at a thrift store for 4 weeks. Let's assume she earns $W per week.
Therefore, the amount of money Melanie earns is 4 * $W = $4W.
Since she needs to earn $1020, we can write the equation as:
$4W = $1020.
To find the value of W, divide both sides of the equation by 4:
W = $1020 / 4 = $<<1020/4=255>>255.
Melanie needs to earn $255 per week.