C. The second equation in system B is  .The solution to system B will be the same as the solution to system A.
Step-by-step explanation:
Given Â
System A:
System B:
When we multiply I equation of system A by -2 then we get new equation
( III equation )
Adding equation II Â of system A and eqaution III then we get
Hence, II equation of system B
By division property of equality
x=-2
Substitute the value of x=-2 in equation I of system B then we get
-10-y=-11
By simplification
=-1
y=1
By simplification
Therefore, the solution of system B is (-2,1).
Hence, option C is correct .
C. The second equation in system B is -7x=14 . The solution to system B will be the same as the solution to system A.