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 =

Total amount earned by Lira and her husband =

=

Together they earned $75,000.





Now,
Amount earned by Lira =

=

=

Therefore, the amount earned by Lira in last year is $31500.