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use the substitution method to solve the system of equations . choose the correct ordered pairs x+y=5 y=7 A.(12,7) B.(-12,7) C. (-2,7) D.(2,7)

Respuesta :

gmany

Answer:

C. (-2, 7)

Step-by-step explanation:

Put y = 7 to the equation x + y = 5:

x + 7 = 5          subtract 7 from both sides

x = -2