I never heard about a "two-step equation". I believe it's the solution process which may have one or several steps.
Your equation has two variables in it ... 'a' and 'x'. So the solution is a four-step process: 1). Get another independent equation that relates the same two variables. 2). Solve one of the equations for one of the variables. 3). Substitute that into the other equation, yielding an equation in a single variable. Solve that one for the single variable. 4). Substitute that value back into the first equation, and solve it for the second variable.
You need another equation to make this a linear equation so you can solve for both variables. One equation with two variables is not enough to determine the correct answer.
2+2
You cannot solve one linear equation with two unknown variables.
It is generally not possible to solve a single equation in two variables: this is one such.
This equation is incomplete, and to solve for two variables, you need two equations. So there is no "answer" for this.
It is not possible to solve one linear equation in two unknown variables.
You cannot solve one linear equation with two variables.
It is not possible to solve a single linear equation in two variables.
7
A two-step equation is an equation that requires two steps to solve We must eliminate any constant that is on the same side as the variable first To solve, use the inverse operations to isolate the variable by itself Remember whatever you do to one side, you must do to the other
By substitution or elimination of one of the variables which usually involves simultaneous or straight line equations.