Question 179265
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Castel's Eqn:
{{{6A+4L=80}}}
We get--->{{{6A=80-4L}}}--->{{{cross(6)A/cross(6)=(80-4L)/6}}},
{{{A=(80-4L)/6}}}, EQN 1
Gabriella's Eqn:
{{{6A+5L=94}}}, subst. EQN 1
{{{cross(6)((80-4L)/cross(6))+5L=94}}}
{{{L=94-80}}}---->L=$14.00/each
Go back EQN 1,
{{{A=(80-4*14)/6=(80-56)/6=24/6}}}
A=$4.00/each
Check via Castel's Eqn:
{{{6*4+4*14=80}}}
{{{24+56=80}}}
$80=$80
Check via Gabriella's Eqn:
{{{6*4+5*14=94}}}
{{{24+70=94}}}
$94=$94
Thank you,
Jojo</pre>