Respuesta :

Nonportrit
Hello,

The answer is "x=10".

Reason:

First write the equation:

2a-1=19

Add one on both sides:

19+1=20

2a=19

Now divide 2 by 20:

20/2=10

a=10

If you need anymore help feel free to ask me!

Hope this helps!

~Nonportrit