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select the TWO systems of equations that have exactly one solution
A. y= 3x + 1
y= -3x + 7

B. y= 3x + 1
y = x + 1

C. y= 3x + 1
y = 3x + 7

D. x + y = 10
2x + 2y = 20

E. x + y = 10
x + y = 12

Respuesta :

A. if you replace x by 1 the answer for both equations is 4
mimanshabasnet123

Answer:

D

Step-by-step explanation:

for D

let (x,y) = (5,5)

5+5=10

5+5=102×5+2×5=20

let (x,y) = (6,4)

6+4=10

6+4=102×6+2×4=20

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