Respuesta :

A=2

First simplify

Regroup terms

Simplify

Subtract 9

Simplify

Addc18a

Simplify

Divide both side by 17

Simplify 34/17

[tex]3a-4a+9=-12a+43-6a[/tex]
[tex]-a+9=-12a+43-6a[/tex]
[tex]-a+9=-18a+43[/tex]
[tex]-a+9+18a=43[/tex]
[tex]17a+9=43[/tex]
[tex]17a=43-9[/tex]
[tex]17a=34[/tex]
[tex]a=34:17[/tex]
[tex]a=2[/tex]

The answer is: a=2