Answer:
Yes
Step-by-step explanation:
From equations (1), (2) & (3)

Answer:
x=7
Step-by-step explanation:

now let’s put together the like terms


now we divide
By 
the result is

Answer:
y is 3 since x is 4 then 4+3=7
Step-by-step explanation:
Answer:
-3
Step-by-step explanation:
So the sides ML and MN are exactly the same. Your equation would look something like this...
3x = x + 10
You first subtract x from both sides to isolate the variable.
2x = 10
Divide 2 from both sides.
x = 5
5 is the length of MN.
I hope this helps love! :)