Question 170617
call mrs ellis age e and her daughters d
:
e=d+28...eq 1
e+11=3(d+11)..eq 2----->distribute---->e+11=3d+33.
:
now take the value of e in eq 1 and plug it into eq 2
:
(d+28)+11=3d+33
:
d+39=3d+33---> combine like terms
:
2d=6
:
{{{highlight(d=3)}}} daughters age
:
{{{highlight(e=3+28=31)}}} mrs ellis age