sethandoan
sethandoan sethandoan
  • 23-02-2020
  • Mathematics
contestada

2x -6y = 5
x+y=2
Solve the system of equations.
(17, -15)
(17/8, -18)
no solution​

Respuesta :

Maxone73 Maxone73
  • 24-02-2020

Answer:

(17/8, -1/8)

Step-by-step explanation:

[tex]\left \{ {{2x-6y=5} \atop {x+y=2}} \right.[/tex]    

the bottom equation is equivalent to x = 2-y

so I switch the value of x in the top equation to x = 2-y

and it becomes 2*(2-y) - 6y = 5

equal to 4 - 2y - 6y = 5

-8y = 1

y = -1/8

then you substitute this value in the second equation

x + y = 2 becomes x + (-1/8) = 2  

x = 2 + 1/8 = 16/8 + 1/8 = 17/8

Answer Link

Otras preguntas

how did your family or parents affect your adolescent development? explain.
the center of the earth. Order the layers as you would encounter them, from the outside in.
El argumento está basado en__del crimen que ayuda al detective aunque no puede hablar. el criminal el personaje la enamorada la víctima
solve by factorisation: 2x²+5x-12=0
29. Find the area of a regular hexagon with apothem of 6 inches.
What year did the bible come out
1) Hast du gestern fussball gespielt? - Nein, ich habe basketball gespielt - Nein, ich habe basketball gespielen - Nein, ich bin Basketball gespielt - Nein, ic
Ideally, the backrest is tilted back slightly, so when you turn the wheel your shoulders are _______ the seat. A. not touching B. touching C. parallel with D
Two collective nouns are _____ and _____. men group herd
Please show all work