SOLUTION
Step1; Write out the given expression
[tex]7x-4+1-2x=Ax+B[/tex]Sep2: Solve the expression on the left hand side
[tex]\begin{gathered} 7x-2x-4+1 \\ 5x-3 \end{gathered}[/tex]Then equate to the right-hand side
[tex]5x-3=Ax+B[/tex]Therefore
[tex]\begin{gathered} A=5 \\ B=-3 \end{gathered}[/tex]The coefficient is 5
The constant is -3