R = 2∙J6 years ago he [Ravi] was 8 years older than Janet.
R-6 = (J-6)+8How old is Ravi?
Simplify that, then substitute 2∙J for R. Solve for J. Then substitute in R = 2∙J. If you have trouble, tell me in the note form below and I'll get back to you by email. Edwin