Hello!

First you had to used apply rule -(-b)=b

Since the denominators are equal to it should be combine by the fractions.

Then add 4+2=6


Finally you had to cancel by the common factor of 3.

Hope this helps! And thank you for posting at here on Brainly. And have a great day! -Charlie :)
Answer:

Step-by-step explanation:
<h2>
<em><u>hope it</u></em><em><u> helps</u></em><em><u> you</u></em><em><u> 3</u></em><em><u><</u></em><em><u>3</u></em></h2>
Answer:
<h2><u>
4</u></h2>
Step-by-step explanation:




<u>4</u>
Answer:
90
Step-by-step explanation:
a)
Since, to find the average of a set of numbers, you need to add them all together and divide by the amount of numbers:

b)
Multiply both sides by 4:

Hope this helps!