let the tens digit be x
let the unit digit be y
x+y = 12
x-y = 4
add them
2x = 16
x = 8
y = 4
the number is 84
Since the choices were quite limited, (x = 5,6,7,8,or9 )
it would have been just as fast to "guess" at the solution
i am a two digit number above 50. the sum of my digits is 12. and the difference of my digits is 4. who am i?
4 answers
84
Let both the numbers be 10x and y
As the question says
x+y=12
x-y=4
Now add both 12 and 4 (12+4=16)
2x=16 (divide: 16รท2=8)
x=8
Now subtract: (16-8=4)
y=4
Therefore 10x and y = (10*8=80) 80+4=84
Now to check the answer:
8+4=12
8-4=4
It is above 50
So the answer is correct
As the question says
x+y=12
x-y=4
Now add both 12 and 4 (12+4=16)
2x=16 (divide: 16รท2=8)
x=8
Now subtract: (16-8=4)
y=4
Therefore 10x and y = (10*8=80) 80+4=84
Now to check the answer:
8+4=12
8-4=4
It is above 50
So the answer is correct
84