Question 1194528
x, granddaughter
y, man


{{{y=x+6x=7x}}}------exactly according to description


{{{7x-13=(x-13)+18(x-13)}}}-------exactly according to description

{{{7x-13=19(x-13)}}}

{{{7x-13=19x-247}}}

{{{-13+247=12x}}}

{{{234=12x}}}

{{{x=234/12}}}

{{{highlight(x=19.5)}}}-------------grand daughter is 19 years 6 months of age.


The man is {{{136&1/2}}} years old.