
You buy 10 lbs of mixed nuts. Cashews cost $ 3.50/lb and walnuts cost $ 2.00/lb How may pounds of each were bought if you spent $ 29.00
Let I buy x pounds of Cashews and y pounds of walnuts.
So, x+y=10
and 3.5x+2y=29
Plugging the value of x from equation 1 to equation 2.
3.5(10y)+2y=29
353.5y+2y=29
351.5y=29
1.5y=6
y=6/1.5=4
So, x=10y=104=6.
I bought 6 pounds of cashew and 4 pounds of walnuts.
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