Question 433505
Let cashews equal x, peanuts y.  Then:
x + y=10
5x+2y=10*3=30
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5x+2y=30
2x+2y=20
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3x=10
x=10/3
y=20/3
So, 10/3lbs. of cashews, 20/3lbs. of peanuts.
*[invoke linear "x", "y", 1, 1, 10, 5,  2, 30 ]