Can anyone solve this? :

35x-21+6-8x

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?

Question 5 spring semester final exam math evaluate

Justin has 750 more than eva and eva has 12 less than justin together they have a total of 63 how much money did