I hope this helps :) I didn't show my work on one I want you to learn how to do this. On a test I won't be there. :) Here you go.
100 ml of fruit squash
sum the parts of the ratio, that is 2 + 7 = 9 parts
divide 450 ml by 9 to find 1 part
1 part =
= 50 ml
squash is 2 parts = 2 × 50 = 100 ml
lemonade is 7 parts = 7 × 50 = 350 ml
total = 100 + 350 = 450 ml
X=-10
by simplifying both sides of the equation then isolating the variable
The answer is 336
The reason is because you have to times 12 x 28