9 + 1/2 (7n -26) - 8n

9 + 1/2 (7n - 26) - 8n

Expand brackets by multiplying by 1/2:

9 + 3.5n - 13 - 8n

Collect like terms:

4.5n - 4

Turn it into an equation:

4.5n - 4 = 0

Isolate 4.5n by adding 4 to both sides:

4.5n = 4

Divide both sides by 4.5 to get the value of n:

n = 8/9

__tx= 60 inches. __cause it's equal to vt