Chapter 6.2, Problem 11P

Reasoning With the substitution method, which variable should you solve for first? Explain.

To determine

To explains: solve for first variable in the system of equation using substitution method.

Explanation of Solution

Given Information: Here we have to explain that which variable should we use first to solve.

You can solve any variable, you will get your answer but for simplicity and according to the proper method, the variable with coefficient 1 or -1 is substituted first and then go for the other variables because we can substitute the value of the variable with coefficient 1 or -1 easily without making it complicated.

Conclusion: The variable with coefficient 1 or -1 is substituted first.