Question

For the following system, if you isolated x in the first equation to use the Substitution Method, what expression would you substitute into the second equation?

-x - 2y = -4
3x + y = 12

-2y - 4

2y - 4

2y + 4

-2y + 4

Answer 1

\(-x - 2y = -4\)

Multiply by -1 both the sides:

\(x + 2y = 4\)

So now subtract 2y from both the sides:

\(x = 4 - 2y\)

Answer 2

So what choice is this ??

Answer 3

@rebecca1233 I am asking to you ..

Answer 4

first one

Answer 5

Really ??

-2y - 4??

4 - 2y ??

Are they same ??

Answer 6

\(x = 4 - 2y\)

Tell me here 4 is positive or negative ??

Answer 7

noo wait

Answer 8

Take your time..

Answer 9

4 should be positive and 2y will be negative..
What option indicates this ??

Answer 10

last one ?

Answer 11

Absolutely..

Answer 12

Well Done..