Answer:
<em>a. you cannot multiply both sides by x because you do not know what x is.</em>
Step-by-step explanation:
Given:
Required
Select which of the option that applies
Considering (a):
A is incorrect:
Because: Multiplying both sides by x has nothing to do with whether the value of x is known or not
Considering (b):
B is incorrect:
Substitute 0 for x in the given expression
Both sides of the equation are undefined
<em>However, you cannot assume x to be 0</em>
Considering (c):
C is correct:
Start by multiplying both sides by x
Then, subtract 1 from both sides
Divide through by 3
Considering (d):
D is incorrect;
Because, the equation is linear