Solve -x > 8 or -x < 4. {x | -12 < x < -6}
{x | x < -12 or x > -6}
{x | x > -12 or x < -6}

-4 < x < -8

Step-by-step explanation:

Given solve -x > 8 or -x < 4.

Solve each inequality first

-x > 8

Divide both sides by -1

-x/-1 > 8/-1

x < -8

Also if -x < 4

Divide both sides by -1

-x/-1 < 4/-1

x > -4

Combine both inequality x < -8 and x > -4

-4 < x < -8

Hence the solution set is -4 < x < -8

part a: 1.08

part b: 27.59