# How do you solve -4t> -20?

Jan 18, 2016

t < 5

#### Explanation:

To solve this inequation divide both sides by (- 4 ).

However , in doing this the inequality sign must be reversed. The same would be true if multiplying by a negative number.

$\frac{- 4 t}{-} 4 < - \frac{20}{-} 4 \Rightarrow t < 5$

Example : - 1 < 2 : multiply both sides by (- 1 ) gives

1 < - 2 : Which is clearly incorrect and is the reason for reversal.

ie 1 > - 2