daniflores2019 daniflores2019
  • 16-01-2021
  • Mathematics
contestada

Solve each system using SUBSTITUTION. Remember to check!


2) y = –2x – 1

y = 3x – 16

Respuesta :

chuity
chuity chuity
  • 16-01-2021

Answer:

[tex]\left \{ {{x=3} \atop {y=-7}} \right.[/tex]

Step-by-step explanation:

We can directly substitute y of the first equation to the second equation.

-2x - 1 = 3x - 16

5x = 15

x = 3

Substituting back to any of the two equations, we get y = -2(3)-1 = -7.  If you check with the second equation, y = 3(3)-16 = -7 as well.

Therefore [tex]\left \{ {{x=3} \atop {y=-7}} \right.[/tex].

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