Question

Which system will have one solution?

Answer 1

option 3

Explanation:

For option 1 :

2x - 8y = -10

-2x + 8y = 10 if we add two equation the result will be 0 = 0 which is we call infinitely many solutions

For option 2 :

2x - 8y = 1

-2x + 8y = 10 if we add like terms of the equations the result will be 0 = 11 and we call this no solutions

For option 3 :

4x + 2y = 18

-4x + 7y = 18 add the like terms and the result will be 9y = 36 and y = 4

therefore option 3 has only one solution.