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Solve the System of Equations...?

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Can anyone help me solve this system of equations and teach me how they solved it. 

3(r-3q)= -4(1+p) 
2(p-3q+4r)= -9 
3(2p+q)+5r= -1

asked Apr 15, 2016 in ALGEBRA 2 by anonymous

1 Answer

0 votes

Step 1:

The system of equations are image, and

image.

Rewrite the equations are image, and image.

Solve the system of equations by elimination method.

Eliminate one variable by using two pairs of equations.

image

Add the and equations to eliminate the one variable.

image

Solve the system of two equations containing image and image to find image value.

image

Divide each side by image.

image

Step 2:

Substitute image into system of equation of image and image find image value.

image

Subtract image from each side

image

Substitute values of image and image into one of the original equation to find image value.

image

Add to each side

image

The solution is image and image.

Solution :

The solution of the system is image.

answered Apr 15, 2016 by Anney Mentor
edited Apr 15, 2016 by Anney

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