exam Maths Puzzle Numerical Ability

Mr. Johnson has 11 quarts of punch that is 16% lemonade. He wants to makee some punch containing 52% lemonade. How much lemonade should he add?

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exam Other Question

Subtract and Simplify

((2-y)/(y-4))-((9y-4)/(4-y))

Thank you I really need help with this!!! can you help on finishing this equation and graphing it? {{{6y+5=5y+3}}} this is what i did so far...i subtracted 5y from both sides and i got y+5=3 then i subtracted the five and