milliefarrell1 milliefarrell1
  • 04-02-2015
  • Mathematics
contestada

3x+2y=4
4x+5y=17
What is the value of x and y?

Respuesta :

eu99li
eu99li eu99li
  • 04-02-2015
{3x+2y=4    /*5
{4x+5y=17    /*(-2)

{15x+10y=20
{-8x-10y=-34        (+)
7x=-14
x=-2

15x+10y=20
15*(-2)+10y=20
-30+10y=20
10y=50
y=5

Answer Link
konrad509
konrad509 konrad509
  • 04-02-2015
[tex]3x+2y=4|\cdot(-4)\\ 4x+5y=17|\cdot 3\\\\ -12x-8y=-16\\ \underline{12x+15y=51}\\ 7y=35\\ y=5\\\\ 3x+2\cdot5=4\\ 3x+10=4\\ 3x=-6\\ x=-2\\\\ \boxed{(x,y)=(-2,5)}[/tex]
Answer Link

Otras preguntas

what is the percent of increase from 500,000 to 1,000,000​
3x6/8 pls answerrrrr
Which event occurred in 1963 and caused the country to experience a major transition? the election of President Johnson the assassination of President Kennedy t
Use the x-intercept method to find all real solutions of the equation. x^3-11x^2+31x-21=0
Do the benefits of colonial rule justify conquering a country? Explain your answer.
50 points! What are answers
In Chapter 3, why is the farmer beating his servant? A.The servant insulted the farmer's home and family. B. he servant tried to run away with Don Quixote. C.
Given that aₙ = (-2) (5)ⁿ⁻1 for a geometric sequence, determine the common ratio: -5 -2 2 5
a ____ is a rule that assigns each value of the independent variable to exactly one value of the dependent variable.
According to Article 1, Section 2 of the constitution, each representative must