Question 1103590
VARIABLES
<pre>
a    number of adult tickets
c    number of children tickets
</pre>


DESCRIPTION TRANSLATED INTO EQUATIONS, LITERALLY
{{{system(a/c=2,3c+6a=120)}}}


Note that the first equation is the same as  {{{a=2c}}}.


SIMPLIFY THE SECOND EQUATION, MULTIPLYING BOTH SIDES BY {{{1/3}}}:
{{{c+2a=40}}}

{{{substituting}}} {{{for}}} {{{a=2c}}}
{{{c+2*2c=40}}}
{{{continue}}}{{{to}}}{{{solve}}}{{{for}}}{{{c}}},
.
.
.


{{{highlight(system(c=8,a=16))}}}