Question

13 - r < 82




PLA I NEED THIS

Answer 1

r > -69

Explanation:

13 - r < 82

subtract 13 from both sides

13 - r - 13 < 82 - 13

- r < 69

to flip the inequality sign, multiply both side by -1 to make r positive:

- r (-1) < 69 (-1)

r > -69

Answer 2

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13-r<82

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First of all, we need to isolate r (get r by itself). What I Mean by that is

We need to get r by itself on one side of the inequality.

So it should look something like this:-

r<___

So r is all by itself.

How will we get r by itself? Well, First of all, we need to subtract 13 on both sides:-

`\longmapsto\bf{-r < 82-13`

Simplifying,

`\longmapsto\bf{-r < 69}`

Now, is r by itself? Nopes, There's also a minus sign next to it , which indicates that r is multiplied by -1.

So we do the opposite operation and divide both sides by -1:-

(watch what happens)

`\longmapsto\bf{r > -69}`

The inequality sign changed from "less than" to "greater than".

This happened because we divided by a negative number on both sides.

Good luck with your studies.
`\ddot\smile`

#TogetherWeGoFar

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