mysteryinc2002
mysteryinc2002 mysteryinc2002
  • 13-09-2019
  • Mathematics
contestada

PLEASE HELP!!!

Solve the system of equations using the substitution method.

x=3+1/2y
−2x−y=3

Enter your answer, as decimals, in the boxes.

( , )

Respuesta :

RTBOSS RTBOSS
  • 13-09-2019

Answer:

x = 3+1/2 y -----Equation-1

-2x-y = 2 -------Equation-1

Multiplying equation 1 by 2  we get

2x = 2*(3+1/2y)

2x = 6+y

y = 2x-6

substituting the value of of y in equation2

-2x - (2x-6) = 2

-2x -2x +6 = 2

-4x = 2-6

-4x = -4

x = -4/-4 = 1

y = 2x-6 = 2-6 = -4

x = 1

y = -4

Step-by-step explanation:

Answer Link
NanaDwumor
NanaDwumor NanaDwumor
  • 13-09-2019

Answer:

x=0.75 and Y=-4.5

Step-by-step explanation:

let x=3+1/2y.....(1)

-2x-y=3.......(2)

substitute (1) into (2)

-2(3+1/2y)-y=3

-6-y-y=3

-2y=9

y=-9/2

put y=-9/2 into (1)

x=3+(1/2)(-9/2)

x=-4.5

Answer Link

Otras preguntas

By the end of the 1800s how did most Americans view industrialist?
List the five conditions that can disturb genetic equilibrium in a population.
Why is patient privacy a genuine concern when using electronic health record systems? A. Patient records are stored in online clouds where anyone could possibly
m2+12=48 solve the quadratic equations using any of the methods​
Which of the following points is the solution of the inequality [tex]y < - |x| [/tex]​
with what speed does a freely falling object dropped from a height of 88.2m hit the ground? how long does it take for it hit the ground?
Number of atoms in 3C1F
F (x) = 64(0.5)x G (x) = 20x+12
what is pragyaparamita​
Match the term with a set of example words: Subordinating conjunctions A) that, which, who B) and, but, or C) because, if, unless​