Crayton657 Crayton657

06-08-2015
Mathematics

contestada

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

Respuesta :

06-08-2015

With Elimination system:
Substract -4x + y = -1 with -2x + y = 1
and... the result: 2x = 2, so x = 1

Subtitution: -2x + y = 1
⇔-2 . 1 + y =1
⇔ -2 + y = 1
⇔y = 3

The final answer is D ( 1, 3)

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