loganmdunn01
loganmdunn01 loganmdunn01
  • 21-04-2020
  • Mathematics
contestada

Solve the system of equations below.
x + y = 5
-4x – 2y = -8

Respuesta :

mberisso
mberisso mberisso
  • 21-04-2020

Answer:

x = -1 , y = 6  

or  (-1, 6)

Step-by-step explanation:

First solve for "y" in the second equation:

[tex]-4x-2y=-8\\-4x+8=2y\\y=-2x+4[/tex]

and now, use this result as a substitution for "y" in  terms of "x" in the first equation:

[tex]x+y=5\\x+(-2x+4)=5\\x-2x+4=5\\-x=5-4\\-x=1\\x=-1[/tex]

Knowing the value of "x", now we place it in the substitution equation to find "y":

[tex]y=-2x+4\\y=-2(-1)+4\\y=6\\[/tex]

Answer Link

Otras preguntas

solve h=-b/2a for b this is a algebra question
What is the solution or solutions for 3[-3x+9]=-18
Polymerization reactions in which polysaccharides are synthesized from monosaccharides or proteins are synthesized from amino acids: a. result in the formation
Need Help pretty fast. Harrison and Sherrie are making decisions about their bank accounts. Harrison wants to Put more money as a principle amount, because the
Which of the following equations represents the greatest value of x? Equation 1 x2 = 17 Equation 2 x2 = 26 Equation 3 x3 = 64 Equation 4 x3 = 27 a. Equation 1
What dose the word helot mean
Write an expression to represent the area of the figure. a)5x^3 + 24.5x^2 + 70.5x + 56 b)10x^3 + 49x^2 + 141x + 56 c)15x^2 + 6x - 48 d)7.5x^2 + 3x - 24
12+2=26 13+3=52 14+4=60 15+5=?
Identify and describe four different aesthetic techniques used to influence the audience of media.
rewrite the expression with parentheses to equal the given value 2 x 6 / 2 + 1