The area of a square can be found by squaring the side length. So, the area of the picture can be found by multiplying 16 by 16. 16 x 16 is 256.
Well, anything in absolute value lines become positive, so the equation would be:
3/4+5+x=13/4
Next we subtract 3/4 to both sides to start separating the variable (x).
So, 5+x=10/4
Next, we subtract 5 from both sides. (5= 20/4)
And we get: x=-10/4.
I hope this helps!
X=17
Distribute 2(x-5)
You are left with 2x-10=24
You then want to get 2x by itself so add 10 on both sides so that you get 2x=34
Isolate x completely by dividing by 2 on both sides which then leaves you with x=17
There are 3 ways of solving a simultaneous problem, substitution method, elimination method and Gauss-Jordan method. I'm gonna use the substitution method since it's easier and i think it would suit your level more.
First let's try solving for y since it's easier to start with.
Firstly we have to find an equation for x:

Great, now we can use the substitution method to find the value of y using the first equation:

Now we know that y=1 we can solve the first equation we made:

And the answer is 
Double check:

And that's our final answer! (4,1)