SOLUTION: Tobi bought 100 oranges at the rate of x oranges for #4 and sold them at the rate of 4 oranges for #x there by making a profit of #45. Find the value of x
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-> SOLUTION: Tobi bought 100 oranges at the rate of x oranges for #4 and sold them at the rate of 4 oranges for #x there by making a profit of #45. Find the value of x
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Question 1136863: Tobi bought 100 oranges at the rate of x oranges for #4 and sold them at the rate of 4 oranges for #x there by making a profit of #45. Find the value of x Answer by ikleyn(52788) (Show Source):
The translation of the condition is this equation
- = 45
Multiply both sides by 4x.
100x^2 - 4*4*100 = 4*45*x
100x^2 - 180 x - 1600 = 0
10x^2 - 18x - 160 = 0
= = .
Onlu\y positive root is meaningful x = = 5. ANSWERANSWER. x = 5.
