Answer :

tcfrance
Ok so =>   8a + a -3 = 6a -2a -3
               9a - 3 = 4a -3
-3 on both sides is gone so 9a = 4a
                                 9a - 4a =0  => 5a = 0 so a=0
[tex]8a+a-3=6a-2a-3\\\\9a-3=4a-3\ \ \ \ /+3\\\\9a-3+3=4a-3+3\\\\9a=4a\ \ \ \ /-4a\\\\9a-4a=4a-4a\\\\5a=0\ \ \ \ /:5\\\\5a:5=0:5\\\\a=0[/tex]

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