Question

Solve the following system of equations: (2 points) −2x + y = 1 −4x + y = −1 a (3, 1) b (−1, 3) c (−1, −3) d (1, 3)

Answer 1

Y=3

Explanation:

Equation 1) -2x + y = 1

Equation 2) -4x + y = -1

Subtract equations from one another.

2x = 2

Divide both sides by 2.

x = 1

Plug in 1 for x in the first equation.

-2x + y = 1

-2(1) + y = 1

Simplify.

-2 + y = 1

Add 2 to both sides.

y = 1 + 2

Simplify.

y = 3

(1,3)