Question 1196134
Grandson is b, and Sandra is b+63.
Five years ago, they were b-5 and b+58.
Second sentence means  {{{b+58=4(b-5)}}}.  


{{{b+58=4b-20}}}

{{{78=3b}}}

{{{b=26}}}

Sandra is {{{highlight(89)}}}.


A slightly different way:
x, Sandra
x-63, grandson
-
{{{x-5=4(x-68)}}}
{{{x-5=4x-272}}}
{{{-5+272=3x}}}
{{{3x=267}}}
{{{highlight(x=89)}}}