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

Shown below is one step in the synthesis of racemic trans-2-(1-propenyl)cyclohexanol from cyclohexane. from the list of reagents provided, choose the reagent(s)
Phyllis wheatly poem to his excellency general Washington
Name a pair of complementary angles.
Plz help correctly explain please being graded!!!
Li can walk 2 miles in 45 minutes.At that rate,how far can she walk in 135 minuets.
A dark purple flower is crossed with a white flower of the same species, and the offspring have light purple flowers. what type of inheritance does this describ
When the following equation is balanced with the lowest whole number coefficients possible, what is the coefficient in front of O2? C3H8 (g) + O2 (g) --->
y = 2x + 3 4x = y = 21 what is the value of x in the solution to the equation ?
How do I work this out
Why we should have free electricity power?