Question 1: Simplify it first, and it becomes: (4x+9)/5-1-2x/3 = (x-5)/2 (1) (Note that the denominator of each term is multiplied by the same multiple at the same time, for example, (0.4x+0.9).

Then the least common multiple of 5,3 and 2,30, multiply both sides of (1) by 30 and remove the denominator.

The final solution of 24x+54-20x-30= 15x-75 is x=9.

Question 2: Is there anything wrong with the title? Is it (1a+2)/3? Is it necessary to say 1a? Please confirm the question and I will continue to answer it.