Question

So if the following system of equations by substitution.

7x+2y= -13
-3x-8y= -23

A. (-3,1)
B. (-3,4)
C. (1,3)
D. (1,1)

Answer 1

x=-3, y=4. (-3, 4). B)

Explanation:

7x+2y=-13

-3x-8y=-23

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4(7x+2y)=4(-13)

-3x-8y=-23

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28x+8y=-52

-3x-8y=-23

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25x=-75

x=-75/25

x=-3

7(-3)+2y=-13

-21+2y=-13

2y=-13-(-21)

2y=-13+21

2y=8

y=8/2

y=4

Answer 2

Explanation:

Option B is correct.

I'm sure (-3 , 4)