4. Solve for x.

 

3(x - 3) - x < x - 1

 

Remove parentheses

 

3x - 9 - x < x - 1

 

Combine like terms

 

2x - 9 < x - 1

 

Transpose x terms to one side and unknown terms to the other.

 

2x - x < 9 - 1

 

Combine

 

x < 8