Three less than one-fourth of the product of eight thirds and nine. write equation, then solve.

Put simply, you have to work backwards in making the equations. Start with the product of 8/3 and 9.
*9

 Next take 1/4 of that. This can be done in two ways, either multiplying by 1/4:
(*9)*

, or dividing everything by 4.
(*9)/4

Finally, subtract three.

The final equation would read:
((*9)*)-3

Using PE(M/D)(A/S), we'd start with *9

3 and 9 cancel out to be 1 and 3, leaving us with , or 8, and 3 and this part of the equation reading 8*3, which is 24.

The next step is , which is 6.

Lastly we subtract 3 from six, leaving us 3.

Subtracting is the opposite of adding