you and your friend spent a total of 15 dollars during lunch. your friend's lunch cost 3 dollars more than yours. how much did you spend for lunch?

Question

you and your friend spent a total of 15 dollars at lunch. your friend's lunch cost 3 dollars more than yours did. how much money did you spend during lunch. please add equation and answer

Answer 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
To prove the solution is correct, plug 6 in for x.
15=3+2(6)
15=3+12
15=15 thus proving the solution is correct.