Question 149964
Cecile's age now = {{{c}}}
Daisy's age now = {{{d}}}
(1) {{{c = 4d}}}
Five years ago, Cecile's age was {{{c - 5}}}
Five years ago, Daisy's age was {{{d - 5}}}
(2) {{{(d - 5) + (c - 5) = 45}}}
sububstitute (1) into (2)
{{{(d - 5) + (4d - 5) = 45}}}
{{{5d - 10 = 45}}}
{{{5d = 55}}}
{{{d = 11}}}
{{{c = 4d}}}
{{{c = 44}}}
Daisy's age is 11 now and Cecile's age is 44 now
check:
{{{(d - 5) + (c - 5) = 45}}}
{{{(11 - 5) + (44 - 5) = 45}}}
{{{6 + 39 = 45}}}
{{{45 = 45}}}
OK