the units digit of a two-digit number is 3 and seven times the sum of the digits is the number itself. find the number.
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is the the no. is 63
vaj:
how
is it correct or not??
yup correct
ok
so let the tens place digit be x........ then according to question..... 7(x+3) = 10x +3 ......7x + 21 = 10x + 3..... 3x = 18......x = 6....so the no. is 63
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Answered by
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Answer:
Unit of two digit number is 3
Let the tens digit number be x
The Number will be 10x + 3
Sum of two digit number = x + 3
According to the question now :
➳ 7(x + 3) = 10x + 3
➳ 7x + 21 = 10x + 3
➳ 21 - 3 = 10x - 7x
➳ 18 = 3x
➳ x = 18/3
➳ x = 6
Therefore, the tens digit number is 6.
Hence,
The required number = 10x + 3 = 10(6) + 3 = 63.
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