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24 August, 03:27

Solve the system of equations by substitution. 2x + y = 3z x + y = 6z What is the value for y from the first equation, that could be substituted into the second equation?

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  1. 24 August, 06:41
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    y = 3z - 2x

    Step-by-step explanation:

    Systems of equations can be solved by a number of know techniques, such as substitution, elimination or graphical approach.

    We are required to solve the system of equations given via substitution;

    2x + y = 3z

    x + y = 6z

    The question requires us to determine the value for y from the first equation, that could be substituted into the second equation.

    We simply need to make y the subject of the formula from the first equation;

    2x + y = 3z

    To do this we subtract 2x on both sides of the equation;

    2x + y - 2x = 3z - 2x

    y = 3z - 2x

    This is the value of y from the first equation, that can be substituted into the second equation.
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