32 to 40 solve it.quick
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32. Cost of pen=x
Cost of pencil=y
Case I-
4x+4y=100
(Taking 4 common)
4(x+y)=100
x+y=100/4
x+y=25................i
Case II-
3x=y+15
3x-y=15.............ii
By elimination method
Adding i and ii
x+y=25
3x-y=15
------------------
4x=40
x=10
Substituting x=10 in (i)
x+y=25
10+y=25
y=15
10rs.= cost of pen box
15ts.=cost of pencil box
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