
To explain:
An error and correct it by solving the following linear system of equations:

Answer to Problem 19E
The addition of two equations gives the value of variable
The correct solution of
Explanation of Solution
Given information:
Calculation:
The given equations are as:
The solution is given in the image is:
Now, in the solving method of the given equation, use the elimination method in which here took addition of two equations which results the value of variable
On observing the given calculation, the error is when two equations are added there is elimination of variable
Now, the correct method of the elimination for given two eqns. is:
Take addition of equation (1) and (2) to eliminate variable
Now calculate the value of variable
Hence, by solving two equations by elimination method get variable values as
Check for solution:
Use eq. (2) as:
Hence, verified.
Chapter 5 Solutions
BIG IDEAS MATH Integrated Math 1: Student Edition 2016
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