Respuesta :
let x= Bert's stickers
let 2x= Ernie's stickers
2x + x = 90
3x=90
÷3. ÷3
x=30
2(30)= 60
Ernie has 60 stickers
let 2x= Ernie's stickers
2x + x = 90
3x=90
÷3. ÷3
x=30
2(30)= 60
Ernie has 60 stickers