The elephant's weight increased by 8% after it walked through the peanut field. If it gained 80 pounds, how much did it weigh before it walk

Let's call the elephant's weight before walking through the field = x.

So we have

x + 80 = 1.08x    subtract x from both sides

.08x  = 80            divide both sides by  .08

x = 1000 lbs

100 divided by 8 times 12.5 equals 1000lbs before going into the field.