Question

Help me plz. I dont understand.

At Monpaz Natural Foods, 3 lbs of walnuts and 6 lb of almonds sets for $51. Five pounds of walnuts and 4 lb of almonds sell for $55. Find the price of one pound of walnuts.

Answer 1

For this, you would use simultaneous equations.

w=walnuts
a=almonds

3w+6a=51
5w+4a=55

Find a way to make one of the unknowns equal. since we are trying to work out the price of a pound of walnuts, I am going to make a equal on each side to leave us with w. This leaves us with:

15w+12a=165
6w+12a=102

Then take them away to leave w:

9w=163

Then solve:

w=163/9
= 18.11111111...

Then round it to 2 decimal places as the measurement is currency.

So 1 pound of walnuts equals $18.11