Description
A student solves the system of equations given below. In which line is an error first made?
Line 1 2x y = 6
- 2x + y = 10
Line 2 0 = 4
Line 3 0 ≠-4 so there is no solution
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Explanation & Answer
2x-y=6
-2x+y=10
Adding
0=16
In line 2 an error is made. Right hand side must be 16 since we are adding the equations.
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