Answer:
B. 2x
Skills needed: Systems Evaluation, Addition of Equations
Step-by-step explanation:
1) We have a system of two equations and we are adding them together. We need to solve for the x-value of when they are both added together.
We are adding [tex]3x[/tex] with [tex]-x[/tex]
2) [tex]-x[/tex] just means [tex]-1x[/tex]
---> This means it is: [tex]3x+-1x[/tex]
-------> When you are adding a negative, you are subtracting a positive:
[tex]3x+-1x=3x-1x=2x[/tex]
[tex]2x[/tex] is your answer.
