Question

Hi this is math

How many pounds of mixed nuts selling for 4.75 dollars per pound (lb, not money) should be mixed with 10 pounds of dried fruit selling for 5.50 dollars per pound to obtain a trail mix that sells for 4.95 per pound?

I find these really hard
x*475 + 10*550 = (x+10)*495
X=27.5 lb?


5500 = 495 x - 475 x + 4950

550 = 20 x

x = 27.5

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