India Languages, asked by deadmau9514, 1 year ago

3 पेन और 9 पेन्सिल का मूल्य ₹ 306 है, जबकि 2 पेन और 8 पेन्सिल का मूल्य ₹ 246 है, तो 1 पेन और 6 पेन्सिल का मूल्य क्या होगा?
₹ 164
₹ 165
₹ 166
₹ 186


sprince77: right answer is 165

Answers

Answered by kanika9876
1
186rupeess
i have given direct answer

kanika9876: hlo princee
sprince77: hey my name is Prince not princee
Answered by sprince77
1

let pen=x and pencil=y

so,

3x + 9y=306 ....(1)

2x + 8y=246 ....(2)

multiply eq 1 by 2 and eq 2 by 3

so,

6x + 18y=612

6x + 24y=738

subtract

→-6y = -126

   y = 21

put value of y in eq2

2x + 8(21) = 246

2x + 168 =246

x = 39

hence value of 1 pen = 39

and value of 1 pencil = 21

so value of 1 pen and 6 pencil= 39 + 6(21)

                                                  = 165 so answer is 165

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