my question is please give my answer
Attachments:
Answers
Answered by
1
Let the tens place digit be a
And ones place digit be b
According to first condition,
b - a = 3 -------(1)
According to second condition,
7 ( 10a +b) = 4 ( 10b + a)
=> 70a + 7b = 40b + 4a
=> 70a - 4a = 40b - 7b
=> 66a = 33b
=> 2a = b -----(2)
On Substituting equation 2 in equation 1, we get
2a - a = 3
=> a = 3
Now,
On putting the value of a in equation 1, we get
b - 3 = 3
=> b = 6
Required number = 10 × 3 + 6
= 36
And ones place digit be b
According to first condition,
b - a = 3 -------(1)
According to second condition,
7 ( 10a +b) = 4 ( 10b + a)
=> 70a + 7b = 40b + 4a
=> 70a - 4a = 40b - 7b
=> 66a = 33b
=> 2a = b -----(2)
On Substituting equation 2 in equation 1, we get
2a - a = 3
=> a = 3
Now,
On putting the value of a in equation 1, we get
b - 3 = 3
=> b = 6
Required number = 10 × 3 + 6
= 36
Similar questions