15 Lines on An Ideal Teacher in English / Short essay on An Ideal Teacher in English / extension.com
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- Опубліковано 18 лип 2022
- 15 Lines on An Ideal Teacher in English / Short essay on An Ideal Teacher in English
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Class 12 k lie likh sakhte h?
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let both digit be x & y
x + y = 12 (sum is 12)
x = 12 - y .................(eq. 1)
now
old digit = 10x + y
new digit = 10y + x
and
old = 36 + new
10x + y = 36 + 10y + x
and putting (eq. 1) we get
10(12-y) + y = 36 + 10y + 12-y
120-10y+y=36+10y+12-y
120-36-12 = 10y-y+10y-y
72 = 18y
y = 4
and
x = 12-y
x = 12-4
x = 8
so the number is 84
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it is wrong, it can be he/she