Ashleymackenzie2015
Ashleymackenzie2015 Ashleymackenzie2015
  • 04-01-2016
  • Mathematics
contestada

How many solutions are there to the following system of equations?
5x 3y=7
2x-y=2

Respuesta :

Billymkhoi
Billymkhoi Billymkhoi
  • 04-01-2016
5x + 3y = 7 (1)
2x - y = 2 (2)

Multiply (2) by 3:
6x - 3y = 6 (3)

Take (1) + (3):
(5x + 6x) + (3y-3y) = 7+6
⇒ 11x = 13
⇒ (11/11)*x= 13/11
⇒ x = 13/11.

y = 2*13/11 -2= 4/11

The final answer is x=13/11, y=4/11.

Answer Link

Otras preguntas

An infant puts her thumb in her mouth repeatedly because she finds it enjoyable or interesting. piaget would describe this as a:
The FDA regulates facilities that manufacture OTC medications. Please select the best answer from the choices provided. T F
What is the answer to the first blank?
The largest amount of money that the federal government lays out is for the transfer program, _____. And its largest expenditure is for _____.
Two vectors are given by a with arrow = 3 î + 6 ĵ and b with arrow = -1 î + ĵ. (a) find a with arrow ✕ b with arrow.
How do you solve 1/2 / -2/5 + (-1/4)
how are igneous rocks formed? step by step please.
If the velocity of an object changes from 15 m/s during a time interval of 4s what is the acceleration of the object
How were the Egyptians protected by their nautral environment?
What two nations loaned money to finance Saddam Hussein during the Iran-Iraq War? Syria Saudi Arabia Egypt Kuwait