Line M is represented by the following equation: x − y = 8

Which equation completes the system that is satisfied by the solution (18, 10)?

2x − y = 26
x + y = 18
2x − 2y = 36
x − y = −28

Question

Line M is represented by the following equation: x − y = 8 

Which equation completes the system that is satisfied by the solution (18, 10)?

 2x − y = 26
 x + y = 18
 2x − 2y = 36
 x − y = −28

anonymous · Answer

@Greg_D

anonymous · Answer

the direct way to find it is to replace that solution in each choice and see which one works...

mathmate · Answer

(18,10)  means x=18, y=10.
You can substitute x and y into each equation and find out which one gives a correct equality.

anonymous · Answer

well i had gotten c for my asnwer

mathmate · Answer

Can you show your work?