bigfella558 bigfella558
  • 03-07-2017
  • Mathematics
contestada

What is the first step in solving this system of equations? 2x – 5y = 7 3x + 7y = –3

Respuesta :

Аноним Аноним
  • 03-07-2017
Multiplying equation by-
2x-5y=1....[*3]
-3x+7y=-3..[*2]


Adding both equations after multiplication,we get-
6x - 15y = 3
-6x + 14y =-6

-------------
y = -3
-------------
Answer Link
playerawesome1
playerawesome1 playerawesome1
  • 03-07-2017
The first step will be to multiply the equation 2x -5y =7 by -3 and multiply the equation 3x + 7y = -3 by 2.
Your new equations will be -6x + 15y = -21.
6x + 14y = -6
Answer Link

Otras preguntas

if 120 marks is 60% what is full marks
What fraction is closest to 3/4? 2/3 3/5 7/10 13/20 Show your working please
Why is man a special creature? What two worlds does he share in?
Is Glass a good conductor of heat? is Metal a good conductor of heat? is wood a good conductor of heat
A packet is dropped from a stationary helicopter, hovering at a height 'h' from the ground level, reaches the ground in 12s. Calculate 1) value of 'h' "displac
What builds proteins in a cell?
how many valenceelectrons does rare earth metals have
1. Compare the location of electrons in an atom based on Bohr's theory with the location of electrons in an atom based on the current atomic theory. 2. Rutherf
What does a journal written by frontier settlers most likely tell you about Manifest Destiny?
how can you tell the difference between additive comparison and multiplication comparison