7 years ago,
I was x years and my sister was 2x+2=32
2x+2=32------eqn1
2 years ago,means 5 years as passed
My age x+5 ,my sisters age=32+5
From eqn 1,
2x+2=32
2x=32-2
2x=30
x=15
So 7 years ago,i was 15 and my sister was 32.
2 years ago,
x+5
15+5=20.
32+5=37
So 2 years ago,i was 20 and my sister was 37.

Presently,
20+2=22 yrs
37+2=39yrs
Hence i am 22years old and my sister is 39 years old