Question 631078
5-cent----10-cent
x---------5x
x+5-------10(x+5)

5x +10(x+5)= 575
5x+10x+50 = 575
15x +50 = 575
....-50..=-50
15x.....= 525
/15......=/15
x=35; There is 35 5-cent stamps.
35+5= 40; There is 40 10-cent stamps.