Sandra is selling red and yellow roses. On the first day she sold 4 red roses and 1 yellow rose for a total of $7. On the second day she sold 3 red roses and 1 yellow rose for a total of $6. What was the price of the two types of roses?
4r +1y =7...eqn 1 3r+1y = 6...eqn 2 Make y subject of formula for eqn 2... y = 6-3r...eqn 3 Subst eqn 3 into eqn 1... 4r +6-3r=7 r =1 Subst r=1 into eqn 3 y = 6-3=3 Red roses cost $1. each Yellow roses cost $3 each
