Answer:
6 < u < 8
Explanation:
10 > 5u/4 > 15/2
To solve this, we need to isolate the variable u
10(4) > 5u/4(4) > 15/2(4)
40 > 5u > 30
40/5 > 5u/5 > 30/5
8 > u > 6
It probably wants you to write it in order so,
6 < u < 8
Your welcome, and if you have any questions, feel free to comment! :D