cece8755 cece8755

13-03-2019
Mathematics

contestada

Solutions to 2 variables equations

-4x+7=2y-3

A) only (2,1)
B)only (5,-5)
C) both
D) neither

Respuesta :

choixongdong choixongdong

13-03-2019

Answer:

C) both

Step-by-step explanation:

-4x+7=2y-3

Plug in

(2,1)

-4(2) +7 = 2(1)-3

-8 + 7 = 2 - 3

-1 = -1

So (2,1) is the solution

(5,-5)

-4(5) +7 = 2(-5)-3

-20 + 7 = -10 - 3

-13 = -13

So (5,-5) is the solution

Answer:

C) both

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