197k views
4 votes
Which method is most efficient in solving a system of linear equations when the two equation have x-values with opposite coefficient values

A. GUESS AND CHECK
B. GRAPHING
C. SUBSTITUTION
D. ELIMINATION

1 Answer

7 votes
Answer: D) Elimination

For example, consider the system of equations below
2x+3y = 9
-2x+6y = 18
Adding straight down will have the x terms (2x and -2x) add to 0x which is just 0. The x terms will go away. In this case, the 2 and -2 are opposite coefficient values for the x terms.
User Gints
by
8.3k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories