Answer: A. 83
B. 94
C. 90
D. 81
Step-by-step explanation:
A. 53+n=86+50
Move all the terms to the left.
53+n-86-50=0
Add all of the numbers together.
n-83=0
Add 83 to the right side.
n= 83
B. 124+90=120+n
Move all the terms to the left side.
124+90-120-n=0
Add all the numbers together.
-1n +94=0
Subtract 94 to the right side.
-1n=-94
Divide each side by -1.
n= 94
C. n+26=31+85
Move all of the terms to the left.
n+26-31-85=0
Add all the numbers together.
n-90=0
Add 90 to the right side.
n= 90
D. 2,769+78=n+2,766
Move all of the terms to the left.
2,769+78-n-2,766=0
Add all the numbers together.
-n+81=0
Subtract 81 to the right side.
-n=-81
Divide both side by -1.
n= 81
