Mathematics

Question

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?


USE THE SUBSTITUTION METHOD PLEAAASSEEEE

PLEASSEEE EXPLAIN :)

1 Answer

  • 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
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