matokiwasssup
matokiwasssup matokiwasssup
  • 06-03-2018
  • Mathematics
contestada

3x+4y=-23
2y-x=-19
What is the solution (x,y) to the systems of equations above?

Respuesta :

tonb
tonb tonb
  • 06-03-2018
If we multiply the bottom equation by 2 and move x to the right, it becomes:

4y = 2x-38

Now we can substitute it for the 4y in the top equation:

3x + (2x-38) = -23 => 5x = -23+38 => 5x = 15 => x=3

Then 4y = 2*3-38 => y = -8

So the solution is (3,-8)
Answer Link

Otras preguntas

why did some of the key decision makers want to avoid attacking or invading cuba
Why do we have bank holidays ?
How many circles, each with a 4-inch radius, can be cut from a rectangular sheet of paper, measuring 16 inches x 24 inches? (A) 6 (B) 7 (C) 8 (D) 12 (E) 24
Help hurry it's timed and I need to pass this
Which set of data of temperatures has the largest dispersion as measured by its interquartile range? 1) 15,17,19,21,21,22,28 2) 21,23,36,37,44,48,50 3) 10,19,22
Which idea originated with Charles Darwin?
Sales in the printing business have doubled for James in each of the last three months. During the last month, he made a profit of $520. If the pattern continue
What events were held at the globe theatre?
How do you solve the system by substitution 6x+2y=-26 x-6y=21
Write standard form of the equation of the line described. Through (2,0) parallel to y =2/3x