Question 975044
The price of a cinema ticket is 10000 for an adult and 7000 for a child. SIXTY people attended the movie and paid 540000. Find the number of children and adults that attended the movie.


Calling the money units, just "money", then assign some variables:
a adults, c children;
and form the described equations:
{{{system(10000a+7000c=540000,a+c=60)}}}


Simplify.
{{{system(10a+7c=540,a+c=60)}}}


Prepare to use Elimination, partway:
{{{system(10a+7c=540,7a+7c=420)}}}


You continue and finish.