Question 915648
L = age of Louis
D = age of Dan


Both are current ages


"louis is 4 times as old as her son dan" so {{{L = 4D}}}


"the sum of their ages is 40" which means {{{L+D = 40}}}


Plug in {{{L = 4D}}} to get...


{{{L+D = 40}}}


{{{4D+D = 40}}}


{{{5D = 40}}}


I'll let you finish up. The goal is to find the value of D. Then use this to find the value of L.


Let me know if you need more help or if you need me to explain a step in more detail.
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Thanks,


Jim