Question 503319
she had x stickers
total 22 kids

each got x/22

15 boys
they gave 3/5 of x/22 to the girls

So they gave a total of 15* 3x/110 = 45x/110 stickers to the girls

7 girls - they have a total of 7*(x/22)=>7x/22

Boys gave 45x/110 

7x/22 + 45x/110 = 768

LCD = 110
35x+45x= 110*768
80x=110*768
x=110*768/80
x= 1056 stickers