Given:
Last year Lira earned $12,000 less than her husband Todd.
Together they earned $75,000.
To find:
The amount earned by Lira in last year.
Solution:
Let x be the amount earned by Lira's husband inn last year.
Last year Lira earned $12,000 less than her husband Todd.
Amount earned by Lira = ![x-12000](https://tex.z-dn.net/?f=x-12000)
Total amount earned by Lira and her husband = ![x+(x-12000)](https://tex.z-dn.net/?f=x%2B%28x-12000%29)
= ![2x-12000](https://tex.z-dn.net/?f=2x-12000)
Together they earned $75,000.
![2x-12000=75000](https://tex.z-dn.net/?f=2x-12000%3D75000)
![2x=75000+12000](https://tex.z-dn.net/?f=2x%3D75000%2B12000)
![2x=87000](https://tex.z-dn.net/?f=2x%3D87000)
![x=\dfrac{87000}{2}](https://tex.z-dn.net/?f=x%3D%5Cdfrac%7B87000%7D%7B2%7D)
![x=43500](https://tex.z-dn.net/?f=x%3D43500)
Now,
Amount earned by Lira = ![x-12000](https://tex.z-dn.net/?f=x-12000)
= ![43500-12000](https://tex.z-dn.net/?f=43500-12000)
= ![31500](https://tex.z-dn.net/?f=31500)
Therefore, the amount earned by Lira in last year is $31500.