What is the answer to 1/2a-7< 2/3a-9

a - 7 < a - 9   Give the fractions a                              common denominator. (2 and 3 both go into 6)
a - 7 < a - 9   Subtract a from both sides
-7 <  a - 9   Add 9 to both sides
2 < a   Multiply both sides by 6 to cancel out the fraction
12 < a   Flip the inequality to make it easier to read
a > 12

The correct answer is state governments.

The 10th amendment of the Constitution states that any law not given directly to the federal government belongs to the state governments. This ensures that the state government still have significant control over the affairs of their state. This gives state governments the ability to pass laws about education, driving requirements, certification processes, etc.