To find A (B C) (the intersection of A with the intersection of B and C), we first find the intersection of sets B and C, and then find the intersection of the result with set A.

Given:
A = {1, 4, 6, 7}
B = {3, 4, 5}
C = {2, 4, 8}

Step 1: Find B C (the intersection of sets B and C):
B C = {4} (as 4 is the only element that appears in both B and C)

Step 2: Find A (B C) (the intersection of set A with B C):
A (B C) = A {4} = {4} (as 4 is the common element in both A and B C)

So, the answer is:
A (B C) = {4}

2x/3 + 5 = 9;

2x/3 = 9 - 5;

2x/3 = 4;

2x = 4 * 3;

2x = 12;

x = 12/2;

x = 6

x^2 ÷ x^-3 = x^[2 - (-3)] = x^5