Question 22158
I'm going to assume your problem is as follows:

 10 + (3/4)a <= (-7/8)a + 5

1st: Multiply both sides of the inequality by "8" to get:

 80 + 6a <= -7a + 40

2nd: Add 7a to both sides to get:

 80 + 13a <= 40

3rd: Subtract 80 from both sides to get:

 13a <= -40

4th: Divide both sides by 13 to get:

   a <= -40/13

Good luck.
Cheers,
Stan H.