Question

the sum of the digits of a two digit number is 7. When the digits are reversed , the number is increased by27. Find the original number..

Answer 1

solve:

a+b=7
10a+b=27+10b+a

Answer 2

10a+b=27+10b+a
9a=27+9b
a=3+b

a+b=7
a=7-b

a=3+b
7-b=3+b
2b=10
b=5

a=7-b
a=7-5
a=2

So the numbers are:

10a+b=20+5=25
a+10b=2+50=52

The original number is 25

Answer 3

I agree with fiddlearound

Answer 4

Do you understand what he did??

Answer 5

i'll try