SOLUTION: how many pounds of salted nuts selling for $4.80 should be mixed with 7 lbs of salted nuts selling for $4.20 per pound to obtain a mixture at $4.38 per pound

Question 210988: how many pounds of salted nuts selling for $4.80 should be mixed with 7 lbs of salted nuts selling for $4.20 per pound to obtain a mixture at $4.38 per pound
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
how many pounds of salted nuts selling for $4.80 should be mixed with 7 lbs of salted nuts selling for $4.20 per pound to obtain a mixture at $4.38 per pound
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Equation:
value + value = value
4.8x + 4.2*7 = 4.38(x+7)
Multiply thru by 100 to get rid of the decimals:
480x + 420*7 = 438x + 438*7
42x = 18*7
x = 3 (# of lbs. of $4.80 nuts needed for the mix)
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Cheers,
Stan H.
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