Answer:
x=8
Explanation:
If both of these equations equal the same thing, that means they are equal to each other.
Now, I don't know what the equation is asking, but I assume it's asking to solve for x.
Since the equations equal each other, we can write a new equation:
100-3x=84-x
subtract 84 from both sides
16-3x=-x
add 3x to both sides
16=2x
divide both sides by 2
8=x
So, x=8.
Hope this helps! :)