Well here there are two parts You and your friend spent 15 dollars your friends lunch cost 3 more than yours <span>
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 valid, plug 6 in for x. 15=3+2(6) 15=3+12 15=15 thus proving the solution is valid.</span>
To solve for this, we will create a system of equations. x + y = 15 x = y + 3 Let's try numbers that add up to 15. I will try 6 and 9, 9 for x, 6 for y. 6 + 9 = 15 9 = 6 + 3 These system of equations works! Since x is your friend's lunch, y is yours. You spent $6. I hope this helps!
