so hmm let's say
t = number of movie tickets purchased
m = number of meals bought
so... he earns 0.5 for each ticket... so if he bought "t" tickets, he then earned 0.5*t or 0.5t , whatever that is
and if he bought "m" meals, since each one is $2 earnings, then he earned 2 * m or 2m, whatever that is
is just so happen, we know, for last month he earned on his rebates $25
thus
0.5t + 2m = 25
it just so happen we also know he bought 22 movie tickets last month
thus
