c+j =784

left money

\( {5c \over 6}\frac{}{}\) = j- 124

\( {5c \over 6}\frac{}{}\)=784-c-124

\( {11c \over 6}\frac{}{}\)=660

c=360 (ans)

This question was answered here

https://web2.0calc.com/questions/math_54780

Bought price: $160 / 20 pounds = $8 / pound Sold price = $10 / pound Profit: ( 10 - 8 ) / 8 = 2 / 8 = 2 ∙ 1 / 2 ∙ 4 = 1 / 4 = 0.25 0.25 ∙ 100% = 25 %

2/3x = 60

x = 90

5/7x =90

solve for x here

Thx

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