Question 791153
3x + 4y = 22.25
x + 3y = 9.50
solve second equation for x
x = 9.50 -3y
substitute in equation 1
3*(9.50-3y) +4y = 22.25
28.50 -9y +4y = 22.25
-5y = -6.25
y = 1.25
x = 9.50 -3*(1.25) = 5.75
therefore a sandwich costs $5.75 and iced tea costs $1.25