Question 1074202
G.E.D. might be fine if you already learned basic algebra.  Otherwise better to do a normal course on Basic Mathematics and either a course on Pre-Algebra or Algebra 1.



{{{4a+3b-2a-3b+a}}}
This is an expression combining the terms with either addition or subtraction.  Combine like terms.


{{{4a-2a+a+3b-3b}}}


{{{(4a-2a+a)+(3b-3b)}}}


{{{3a+0}}}

{{{highlight(3a)}}}



Explanations and steps can be made more detailed, but the work shown should be sufficient.