Answer:
Kelly bought 9 shirts.
Solution:
As given she spent total [tex]\$225[/tex] on jeans and shirt
Let us assume that she bought x number of jeans and y number of shirts
She bought total 14 items,
Hence [tex]x+y = 14[/tex]
[tex]x=(14-y)[/tex] ………… (i)
Each jens costs [tex]\$18[/tex], So x number of jeans will cost total [tex]\$18x[/tex]
Each shirt costs [tex]\$15[/tex], so y number of shirts will cost total [tex]\$15y[/tex]
So we can say ,
[tex]18x +15y = 225[/tex] ………… (ii)
Now substituting value of (i) in (ii) we get,
[tex]18\times(14-y) +15y = 225[/tex]
[tex]252 -18y +15y = 225[/tex]
[tex]-3y = 225 -252[/tex]
[tex]-3y=-27[/tex]
[tex]y = 9[/tex]
So, [tex]x = (14-9) = 5[/tex]
She bought 9 shirts.
