Michael is 4 times as old as BrandonMichael is 27 years older than BrandonLet Michael age =X , Brandon age=YX=4×Y -------(1)

X=Y+27 -----(2)

By substituting (1) in (2)

4Y=Y+27

3Y=27

Y=9 years.

Then X=4×Y=4×9=36 years =Michael age.