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20 July, 21:13

Seven bags of peanuts and 3 sandwiches cost 22. Three bags of peanuts and 1 sandwiche cost 8. The cost of 1 bag of peanuts is. one sandwich cost

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  1. 20 July, 21:37
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    Replace the informations you don't know with letters.

    x = number of bags

    y = number of sandwiches

    7x + 3y = 22

    3x + y = 8

    Then solve the equations.

    First, isolate the y in the second one like this:

    y = 8 - 3x

    then replace the y in the first equation with its worth from the second equation:

    7x + 3 (8 - 3x) = 22

    solve for x, then replace the value in the equations to get the value of y
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