Plz Help me, this is kinda difficult for me

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?

Plz heeeeeeelp plz give me the answer

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180