Question

i wrote two digit nos whose unit's place has "x" but the digit in tens place is 5 now the number is 11 times the digit in unit place​

Answer 1

Explanation:

x is a two digit number with tens digit a and units digit b:

10a+b=x

The units digit is 4 times the tens digit:

b=4a

The sum of a and b is 10:

a+b=10

Simple subsitution:

a+4a=5a=10

a=10/5=2

Since the sum of a and b is 10:

b=10−a=10−2=8

x=10a+b

=10×2+8

=20+8

=28

∴ x = 28