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Which of the following systems of equations has the solution (1,2)?

A. y−x=1
3y−4x=10

B. 3y−x=1
8y−2x=4

C. 3y+2x=8
4y−x=7

D. −2y+5x=−1
2y+2x=6

Respuesta :

ecanada12

Answer:

C

Step-by-step explanation:

Plug in 1 for x and 2 for y  in each equation. Your answer is the one where both equations are true.

3(2) + 2(1) = 8

6 + 2 = 8

8 = 8  

4(2) - 1 = 7

8 - 1 = 7

7 = 7