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
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186rupeess
i have given direct answer
i have given direct answer
Answered by
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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