For this case we have the following equation:
 (3/4) z - (1/4) z + 3 = (2/4) z + 5
 Rewriting we have:
 z (3/4 - 1/4) + 3 = (2/4) z + 5
 z ((3-1) / 4) + 3 = (2/4) z + 5
 z (2/4) + 3 = (2/4) z + 5
 (2/4) z + 3 = (2/4) z + 5
 (2/4) z - (2/4) z + 3 = 5
 3 = 5
 Equality is not met.
 Answer:
 a. It has no solution.