
A.
20x=x change this to 20= x+x
What same two numbers add to 20?
B.
20x6=0
Combine like terms 20 and 6
Now you have 14x=0
Now solve for x
C.
x+4=3+x+1
Combine like terms 3 and 1
x+4=4+x
In this problem the equations are the same. So there are an infinite amount of numbers you could place there.posted by Mia
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