Answer:
The first step is to isolate the variable, which in this situation is x. We can do this by subtracting 3 from both sides of the equation, so that the equation would become 5x=15.
Step-by-step explanation:
Answer: x = 3
Step-by-step explanation:
I am not sure what wording you need for your justifications, so I have solved the problem for x with explanations and you can reword it as needed.
Given equation:
5x + 3 = 18
(Step 1) Subtract 3 from both sides of the equation to isolate the variable with inverse operations:
5x + 3 - 3 = 18 - 3
5x = 15
(Step 2) Divide 5 from both sides of the equation to isolate the variable with inverse operations:
(5/5)(x) = (15)/5
x = 3