Insert the y factor (2) into the equation. Once you have done that, you are left with 9(2)+6. If the y factor was not added into the equation, you wouldn't be able to solve the equation.
First you should ask how you can express each side in terms of the smallest. Let the smallest side equal x. Because the second side is 6 more than the smallest, you can write it as x + 6. The third side is twice the size of the smallest, so you can call it 2x.
All of these sides add up to equal 25 units, so you can write the equation
x + x + 6 +2x = 25
From there, you can add like terms, solve for x, and plug it in to solve for the lengths of the other sides. Lmk if you have any more issues.
Answer:
hope it helps you.........
Find out how much you need for one person then multiply by 18 is one way you could do this..
4 divided by 24 = 0.166666666666667 x 18 = 3 litres of lemon-lime soda.
2 divided by 24 = 0.083333333333333 x 18 = 1.5 pints of servet
6 divided by 24 = 0.25 x 18 = 4.5 cups of ice.
Hope this helps!
Your teacher may have wanted you to (some how) use your 6x tables to work this out?!