if cost of 2 pens and pencils is 86 and 4 pens and one pencils is 112 find cost of
i》》one pen
i》》 one pencil
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Answered by
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Answer:
Let the cost of pen be 'x'
the cost of pencil be 'y'.
Given,
2x+2y=86
x+y=43 _(1)
4x+y=112 _(2)
(2) - (1) :
3x=69
x=23.
Substituting the value of x in any equation , we get:
y=20.
Therefore , the cost of 1 pen is 23 and cost of 1 pencil is 20.
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