the total cost of 2 pencils and 5 pens is rupees 27 and the total cost of 5 pencils and 2 pens is rupees 15. Find the cost of one pen.
please solve step by step.
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the total cost of 2 pencils and 5 pens is rupees 27 and the total cost of 5 pencils and 2 pens is rupees 15. Find the cost of one pen.
please solve step by step.
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Step-by-step explanation:
No of pencils= x No.of pens=y
Answer:
2pencils+5pens= 27
5pencils + 2 pens= 15
Step-by-step explanation:
adding both ,we get
7 pencil s +7pens =42 now dividing by 7 both side we get
1pencil+1pen =6
(1)_(2)
3pens -3pens =12 dividing by 3
1pen -1pencils=4 now solving this
adding this
2pen=10
1pen =5