Question

Miguel is 3 years older than Katrice. In 9 years the sum of their ages will be 51. How old is Miguel now?

Answer 1

Let katrice age be x
x+x+3=51
2x=51-3
2x=48
x=48/2
x=24
Now x+3
=24+3
=27

Explanation
If katrice age is x then Miguel age is x+3 because she is 3 years older