Question 111858
X+Y=145 OR X=145-Y
2X+5Y=524 OR 
2(145-Y)+5Y=524
290-2Y+5Y=524
3Y=524-290
3Y=234
Y=234/3
Y=78 THE NUMBER OF 5$ TICKERTS WERE SOLD.
X+78=145
X=145-78
X=67 NUMBER OF 2$ TICKETS WERE SOLD.
PROOF
2*67+5*78=524
134+390=524
524=524