Select the correct answer from each drop-down menu. A system of equations and its solution are given below.
System A
x - y = 7
-3x + 9y = -39
Solution: (4,-3)
Complete the sentences to explain what steps were followed to obtain the system of equations below.
System B
x - y = 7
6y = -18
To get system B. the (second/first)
equation in system A was replaced by the sum of that equation and (-3, -9, 9, 3) times the (second/first)
equation. The solution to system B (is not/ is)
the same as the solution to system A