Problema Solution
Sally wants to buy some accessories for her hair. She can buy two scrunchies and four barrettes for $12.50 or one scrunchies and six Barrettes for $12.50 how much does the scrunchie cost if she wants to buy
Answer provided by our tutors
Let x be the number of scrunchies and y be the number of barrettes.
So we change the English into algebra this way:
2x + 4y = 12.50
x + 6y = 12.50
If we double the second equation and subtract it from the first, we can eliminate the x's...
2x + 4y = 12.50
-(2x + 12y = 25.00)
and we have
-8y = -12.50
y = $1.55
and by plugging this into either of the original equations, we find
x = $1.34