Question

Solve the following system of equations:
-2x + y = 1

-4x + y = -1

(3, 1)

(-1, 3)

(-1, -3)

(1, 3)

Answer 1

Don't give away answers

Answer 2

what?

Answer 3

so... hmmm have you covered "solving by substitution" or "solving by elimination" yet?

Answer 4

Solving by substitution will give you (1,3)

Answer 5

Yes I read the lesson for that

Answer 6

well.. .then you could just substitute
say \(\bf 2x + y = 1\\
-4x + y = -1
\\ \quad \\ \quad \\
2x+y=1\implies {\color{blue}{ y}}=1-2x\qquad then
\\ \quad \\
-4x+{\color{blue}{ y}}=-1\implies ?\)

Answer 7

Its really not that hard, if you need help on learning how to actually do it. I could help you

Answer 8

O it just clicked Thanks everyone

Answer 9

yw