wonder556 wonder556

06-02-2021
Mathematics

contestada

Solve the system of equations by the substitution method.
y = 4x-9
y-x=-3

A.(2, -1)
B.(-4,-7)
C.(-1,2)
D.(-7,-4)

Respuesta :

ameliaswan ameliaswan

06-02-2021

Answer:

A. (2, -1)

Step-by-step explanation:

(4x - 9) - x = -3

3x - 9 = - 3

3x = 6

x = 2

y = 4(2) - 9

y = 8 -9

y = - 1

(2, -1)

Check

-1 - 2 = -3

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