To find : the solution to the given system of equation using elimination method
Answer to Problem 8E
The solution to the system of equation is
Explanation of Solution
Given information : The system of equation is
Concept Involved:
Solution of a system of equation is the point which makes both the equation TRUE.
Graphically the solution to the system of equation is the point where the two lines meet.
Method of Elimination: To use the method of elimination to solve a system of two linear equations in
1. Obtain coefficients for x (or y) that differ only in sign by multiplying allterms of one or both equations by suitably chosen constants.
2. Add the equations to eliminate one variable.
3. Solve the equation obtained in Step 2.
4. Back-substitute the value obtained in Step 3 into either of the originalequations and solve for the other variable.
5. Check that the solution satisfies each of the original equations.
Calculation:
Description | Steps |
Label the given system of equation | |
In order to get rid of fraction in 2nd equation multiply 3 throughout to get the 3rd equation | |
Add 1st and 3rd equation to eliminate the ‘y’ variable | |
Divide 3.5 on both sides of the equation | |
Simplify fraction on both sides of the equation | |
Substitute 2 for | |
Simplify in left side of the equation | |
Subtract 6 on both sides | |
Combine like terms in left side of the equation |
Conclusion:
The solution to the given system of equation is
Chapter 7 Solutions
EBK PRECALCULUS W/LIMITS
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