Question

Question is in picture.

Answer 1

Answer:

B. 2x + y = 4

Step-by-step explanation:

Having the system of equations in its simplest form

$\left\{\begin{array}{ccc}ax+by=c\\dx+ey=f\end{array}\right$

If

$a=d,\ b=e,\ c=f$

then the system of equations has infinitely many solutions.

If

$a=d,\ b=e,\ c\neq f$

then the system of equations has no solution.

If

$a\neq d\ or\ b\neq e$

then the system of equations has one solution.

We have the equation

$y=-2x+4$

Convert to the standard form Ax + By = C:

$y=-2x+4$              add 2x to both sides

$y+2x=-2x+2x+4\\\\2x+y=4$