Answer:
10x - 15, where x is the amount of time Emily spends on homework
Step-by-step explanation:
We can set up an algebraic equation so solve this problem.
Let the amount of time Emily spends be x.
Then Abbey spends, 3x-5 hours, and Nation spends 2(3x-5) --> 6x - 10 hours.
Now just add x, 3x-5, and 6x-10:
x+3x-5+6x-10
-> 10x -15