Question

A baby otter was born 3/4 of a month early at

birth it’s weight was 7/8 kilograms which is 9/10 kilograms less than the average weight of the newborn otter in the aquarium what is the average weight of the newborn otter

Answer 1

`(71)/(40)\ kg` or
`1(31)/(40)\ kg`

Explanation:

Let

x-------> the average weight of the newborn otter

we know that

`x-(9)/(10)=(7)/(8)` -----> linear equation that represent the situation

solve for x

Adds
`(9)/(10)` both sides

`x=(7)/(8)+(9)/(10)`

`x=(10*7+8*9)/(80)\\ \\x=(142)/(80)`

Simplify

`x=(71)/(40)\ kg`

Convert to mixed number

`(71)/(40)=(40)/(40)+(31)/(40)=1(31)/(40)\ kg`