Isolate the variable by adding 5 to both sides.
-5x - 5 + 5 > 15 + 5
You're left with this: -5x > 20
Continue the operation, dividing both sides by -5 and reversing the comparison because we are dealing with a negative number.
x < -4
Now plug -4 into the original inequality.
-5(-4) - 5 > 15
20 - 5 > 15
15 > 15
Since 15 is equal to 15 and not greater than, we know that any number below -4 will cause the original inequality (-5x - 5 > 15) to be true; therefore, x > -4, so Answer 1 is correct.
