Plz guys help me plz

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

Rewrite 9 log, x2 in a form that does not use exponents. 9log, x = log, x

Meee i honestly dont know what this question talking about