-6=2(u+3)-5u pls help me with this

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?

Which of the following is the best first step in solving the equation below? 4+2㏒³x=17

5x−4≥12 or 12x+5≤−4 can you with this problem