Suppose I want to solve a simple equation in mathematica x-a=0.So I am writing the mathematica code for this as below:

`Solve[x - a == 0, x] `

So the output will be as below:

`{{x -> a}} `

Now suppose I have assigned a value for ‘a’ beforehand and then want to solve the same equation.So my code will look like below:

`a = 1; Solve[x - a == 0, x] `

And the output in this case will be like below:

`{{x -> 1}} `

Now if I want an output in this case as `{{x -> a}}`

,what modification should I do in my code ?

Note: `Clear[a]`

will work,but I don’t want to remove permanently the assigned value to a