Answer:
12,455 + x = 23,894
x = 11,439
Explanation:
Let's say that the variable 'x' represents the salaries for the second month, so out equation would be:
12,455 + x = 23,894
To solve, we must isolate the variable by subtracting 12,455 from both sides:
12,455 + x = 23,894
-12,455 -12,455
x = 11,439
So, the second month's salary was $11,439
Hope this helps :)