The number of necklaces and bracelets that mary anne sold are;
15 necklaces and 5 bracelets
We are told that;
Number of necklaces and bracelets sold = 20
Let number of necklaces be x and let number of bracelets be y.
Thus;
x + y = 20
We are told that she sold 3 times as many necklaces as bracelets. This means that; x = 3y
Putting 3y for x in x + y = 20 and we have;
3y + y = 20
4y = 20
divide both sides by 4 to obtain;
y = 20/4
y = 5 bracelets
Since x + y = 20, then;
x + 5 = 20
x = 20 - 5
x = 15 necklaces
Thus, she sold 15 necklaces and 5 bracelets
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