Question

What is the solution of the system? Use elimination.

7x+5y=19
-7x-2y=-16
A. (–2, –1)
B. (–2, 1)
C. (2, 1)
D. (2, –1)

Answer 1

Answer is C. (2, 1) If you want explanation let me know.

Explanation:

Answer 2

C (2,1)

Explanation:

7x+5y=19

-7x-2y=-16

Add both equations together to eliminate x

7x+5y=19

-7x-2y=-16

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3y = 3

Divide each side by 3

3y/3 = 3/3

y =1

Now we need to find x

7x+5y = 19

7x +5 = 19

Subtract 5 from each side

7x+5-5=19-5

7x=14

Divide by 7

7x/7 = 14/7

x=2

(2,1)