(6,1) is a solution to the system:
−2+=−11
−−9=−15
Remember that
If an ordered pair is a solution of the system, then the ordered pair must satisfy both equations
Verify equation 1
For x=6 and y=1
substitute in equation 1
-2(6)+(1)=-11 -------> -12+1=-11 ------> is true
ordered pair satisfy equation 1
Verify equation 2
For x=6 and y=1
-(6)-9(1)=-15 -------> -6-9=-15 -----> is true
ordered pair satisfy equation 2
therefore
answer is true