Final answer:
To find Sandra's salary in the previous year, we can set up an equation using the information given. By solving the equation, we find that her salary in the previous year was $42,000.
Step-by-step explanation:
To find Sandra's salary in the previous year, let's assume her salary in the previous year was x dollars. Her salary this year would then be (x + $2000) dollars.
According to the question, Sandra saves 12% of her salary for retirement. This year, she saved $5,280. So, we can write the equation:
0.12 * (x + $2000) = $5,280
Simplifying the equation, we have:
0.12x + $240 = $5,280
Subtracting $240 from both sides of the equation, we get:
0.12x = $5,040
Dividing both sides of the equation by 0.12, we find:
x = $5,040 / 0.12
Therefore, Sandra's salary in the previous year was $42,000.