Answer:
When expression for y in the second equation is substituted into the first equation than the resulting equation -x + 6 = 1 .
Option (a) is correct .
Step-by-step explanation:
As given the equations in the questions are
3x + y = 1
y = 6 - 4x
As expression for y in the second equation is substituted into the first equation .
i.e put y = 6 - 4x in 3x + y = 1 .
3x + 6 - 4x = 1
Solving the above
-x + 6 = 1
Therefore the when expression for y in the second equation is substituted into the first equation than the resulting equation -x + 6 = 1 .
Option (a) is correct .
