Plz answer for 35 points

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

See attachment below and find the equivalent of tan(∠qsr)

Damon makes 20 cups of lemonade by mixing lemon juice and water. the ratio of lemon juice to water is shown in the tape diagram. lemon juice\text{lemon juice} lemon juice water\text{water} water how much lemon juice did damon use in the lemonade? cups