A farmer sells his com for $320 a metric ton with a small surcharge of $25. His neighbor sells her corn crop for $320 a metric ton and gives a $20 rebate. Write the cost model equations for both farmers and find the amount of corn that
makes the costs equal.

It must be less than 4 but greater than -4

Step-by-step explanation:

1 - Give our unknown a variable

We'll give the integer the value x

2 - Write out the equation

| x | < 4

Because absolute value means its always positive, this means it has a range between -4 and 4 when given the rule that it must be less than and not equal to 4.

So his number x must be less than 4 but greater than -4

This is written as -4 < x < 4