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Mathematics
Problem
A notebook costs
3
l
e
s
s
t
h
a
n
t
w
i
c
e
t
h
e
c
o
s
t
o
f
a
p
e
n
.
I
f
4
n
o
t
e
b
o
o
k
s
a
n
d
5
p
e
n
s
c
o
s
t
3 less than twice the cost of a pen. If 4 notebooks and 5 pens cost
3
l
ess
t
han
tw
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ce
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h
ecos
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o
f
a
p
e
n
.
I
f
4
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o
t
e
b
oo
k
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an
d
5
p
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n
scos
t
83, find the cost of each.
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