Since we are trying to find the adult seats, we'll set that to x. Now the student section is 2x + 25. The total seats is 130 which is the student section and adult section added together. So now we can write an equation from the information given...
15 ounces of lemon juice will be needed. You can solve this by firstly making a fraction of 10/4. You set this equal to the equation x/6 and then solve for x by cross multiplying. Hope his helped!!