7n + 3 = 3n + 27
7n -3n =27-3
4n =24
n= 6.
Answer:
the first option
Step-by-step explanation:
Given
Ax + By = C ( subtract By from both sides )
Ax = C - By ( divide both sides by A )
x = 
Answer:
A
Step-by-step explanation:

Hope this helps!
1/2 ÷ -3/7 = -7/6 The answer is -7/6