Given:
The equation is

Find-:
The solution of the equation
Explanation-:
The first equation is

The second equation is

Both equations are the same.
For slove, the two unknown variables need two equations.
So,
There is NO SOLUTION
0.9=0.9/1=9/10=90/100
0.91=0.91/1=9.1/10=91/100
9/10=90/100
90/100<91/100
the greatest is 91/100 or 0.91