Answer:
24
Step-by-step explanation:
We have a system of equations, so we can start with the second equation:

And move y to the other side to isolate x:

Now we can replace x into the first equation:

Notice that we can cancel out the y squared terms:

Now we just need to find x by replacing y into the second equation:

And finally, add them:

Hope this helps.
Answer:
25
Step-by-step explanation:
5(n-8)=3n+10
5n-40=3n+10
5n=3n+50
2n=50
n=25
Answer:
10 & 40
Step-by-step explanation:
x+10=20------------------10-20=10
y-8=32--------------------32+8=40
√8 = √(4x2) = 2√2
4√2 =4√2
2√2-4√2 = -2√2