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Mathematics 9 Online
OpenStudy (anonymous):

Using complete sentences, explain which method you would use to solve the following system of equations and why. In your answer, include the solution to one of the variables and how you found it using the method you chose. 2x + y + z = –7 x – 3y + 4z = –14 x – 2y – 3z = –11

OpenStudy (anonymous):

start by making one VARIABLE the subject of the formula.Just pick any equation.

OpenStudy (anonymous):

For instance lets make y the subject of the formula on the first equation (y=-7-z-2x)

OpenStudy (anonymous):

Now since u know the value for y..Now for solving the equation. U take that y value and Substitute on either one of the equations. Remember value for y is -7-z-2x instead of y u write that.

OpenStudy (anonymous):

Thanks for helping:D

OpenStudy (anonymous):

Sure

OpenStudy (anonymous):

hi you can do it by matrices.

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