You and a friend spent a total of $15 for lunch. Your friend’s lunch cost $3 more than yours did. How much did you spend for

You and a friend spent a total of $15 for lunch. Your friend’s lunch cost $3 more than yours did. How much did you spend for lunch?

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  1. your total spent is $15

    Your friend spent $3 more than you, this is represented by 3+x.

    You spent an unknown amount of money, this is represented by x.

    So, your equation is 15=3+x+x.

    This becomes 15=3+2x.

    You then subtract 3 to the other side to get.

    12=2x

    Then divide 12 by 2, in order to leave variable "x" by itself.

    6=x is the amount you spent on lunch.

    Your friend spent $3 more so add $3 to the amount you spent to get...

    $9 spent by your friend.

    You=$6

    Friend=$9

    Total=$15

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