12a - 11 = 9a - 1?

1 answer

To solve for a, combine all terms with variables on the left side of the equation, and all constants on the right side of equation.
Note that when we transpose a term to the other side, its sign becomes the opposite:
12a - 11 = 9a - 1
12a - 9a = 11 - 1
3a = 10
To get a, divide everything by the numerical coefficient of a (or the number before the variable a, which is 3):
a = 10/3

I'm not Reiny but I hope you could trust my answer. Hope this helps~ :3