Answer
<h2>
4</h2>
Step-by-step explanation:
Given,
r = 10
Let's create an equation,

plugging the value of r

Multiply the numbers

Move 5s to L.H.S and change its sign
Similarly, Move 30 to R.H.S and change its sign.

Calculate

The difference sign ( - ) should be cancelled on both sides

Divide both sides of the equation by 5

Calculate

The value of s is 4.
Hope this helps..
Best regards!!
1+5=6 so 6/8
Simplifying 6/8 is 3/4
Yes it does because it is even in each side