Answer:
4x=20+4(10); x=15
Step-by-step explanation:
20+4(10)=4x
This is where x is the number of stickers per sheet.
This is the equation because she has 20 stickers.
To find the original number of stickers, we have to add back the amount given.
She has 4 sheets and gave 10 stickers from each sheet. This means she gave away 4*10 stickers.
Now, we can solve the equation:
20+40=4x
60=4x
x=15
