smichelle26 smichelle26
  • 04-02-2020
  • Mathematics
contestada

Please solve the following system of equations by
substitution.
y = 3x - 4 and 4x + 3y = 1

Respuesta :

profarouk profarouk
  • 04-02-2020

Answer:

(1 , -1)

Step-by-step explanation:

y = 3x - 4  (1)

4x + 3y = 1 (2)

if we substitute y by 3x - 4 in the second equation we get

4x + 3(3x-4) = 1 ⇒ 4x + 9x - 12 = 1 ⇒ 13x = 13 ⇒ x = 1

now ,we substitute x by 1 in the first equation

y = 3(1) - 4 = 3 - 4 = -1

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