Question

10) Solve using any method
10x+2y=42
5x+y=20

Answer 1

The answer is no solution! Using substitution, you come to 20 = -21, which is a false statement.

Answer 2

no solutions

Explanation:

10x+2y=42

5x+y=20

Multiply the second equation by -2 to use elimination

-2(5x+y)=20*-2

-10x -2y = -40

Add this to the first equation

10x+2y=42

-10x -2y = -40

--------------------------

0 = 2

This is never true. This means there are no solutions